Haidong is a traditional agricultural town. During the Republic of China, agricultural cultivation was extensive, drought and water shortage, extensive cultivation and poor harvest, and it was in a closed and backward state. In the mid-20th century, the people's government led the people to open mountains to cultivate fields, change slopes into terraces, build water conservancy projects and improve soil, thus gradually improving the basic conditions for agricultural production. Laotaiqing Reservoir has been built successively in the town, with a storage capacity of1160,000 m3, which basically meets the water demand of Haidongbazi, initially showing water-saving effect. At 1990, more than 8,000m tunnel of the water conservancy project of "Diversion Er into the Shore" crossed the southeast side of Laotaiqing Reservoir, causing the groundwater to be cut off and the Laotaiqing Reservoir to dry up. Therefore, the town has strengthened the construction of pumping stations, and now there are 42 pumping stations with 27 levels, with an installed capacity of 19 19 kW and an irrigation area of more than 6,000 mu. The town has cultivated land 1 18 14 mu, including 6,287 mu of paddy fields, 3,258 mu of irrigated land and 2,269 mu of mountainous areas. The main crop varieties are rice, corn, wheat, broad beans and potatoes, and the main mountain crop varieties are white peas, hemp peas, soybeans and kidney beans. With the popularization and application of agricultural science and technology, the town's total grain output and per unit area yield have been continuously improved. The total grain output of 1980 is 5.48 million kilograms. In 2004, the total grain output was 7.83 million kilograms, and the average yield per mu increased from 276 kilograms to 340 kilograms. 1983, the rice "Dianyu 1No." (also known as "Yizhuqing") planted by Nancun farmers Yang and Zhao passed the acceptance of higher authorities and experts, and the average yield per mu reached 10 17 kg, which set a record for the highest yield per mu of rice in the world at that time. Agricultural contracting to households greatly mobilized farmers' enthusiasm for production. Farmers have applied what they have learned, constantly adjusted the agricultural industrial structure, made every effort to develop characteristic agriculture, and established various famous, excellent, special and exotic agricultural product bases according to local conditions. According to the statistics at the end of 2004, the town has developed more than 2,400 mu of special agricultural products bases such as yam, Cangshan lily, fresh corn, garlic and houttuynia cordata, and the agricultural output value has been greatly improved. The planting area of flue-cured tobacco in the town is10.05 million mu, and scientific and technological measures such as floating seedling raising, fixed fertilization and plastic film mulching have been fully promoted. The annual purchase of compulsory tobacco leaves reached 3,000 tons, achieving agricultural efficiency and increasing farmers' income. The town has developed grass and cattle breeding and built a dairy farming base. A dairy farmer in Shanghe Village has raised 50 cows. Every year, the town finance arranges certain special funds to support the adjustment of agricultural industrial structure, vigorously develops high-quality and efficient agricultural products with market competitiveness, actively matches the bridge, contacts dealers to sign production and sales contracts, develops "order-based" agriculture, and gradually establishes the production and operation mode of "ten bases and ten farmers in the company". While developing modern agriculture, the town's forestry, animal husbandry and fishery have also developed greatly. In forestry, the state carried out aerial seeding afforestation, people's soldiers and municipal government units went to Haidong to dig trees, towns and villages continued to carry out afforestation, and set up professional teams to strengthen management and protection. "Natural forest protection project" and "ecological environmental protection project" have achieved remarkable results. By the end of 2004, the forest coverage rate in the town reached 54. 17%, with a total forest area of over 86,000 mu and a total forest stock of 60,960 cubic meters. Haidong is a breeding base for sows and piglets in Dali. According to the statistics at the end of 2004, the number of sows in the town was 753 1 head. In that year, piglets were born 1 12965, and 90372 piglets were slaughtered. Fishery, in 2004, the catch was 108 1 ton, shrimp and crab were 4 18 ton, and cultured fish were 652 tons.

Haidong is the hometown of Dali Sydney, with an orchard area of over 24,000 mu. Sydney has been planted in Haidong for more than 1000 years. During Nanzhao and Dali periods, Sydney in Haidong was a high-grade fruit dedicated to the Central Plains court. Due to the suitable climate and soil in Haidong, Sydney has large fruit, thin skin, tender meat, sweet and crisp taste, and more juice and less residue. Sydney is rich in fructose, protein, phosphorus, calcium, iron, vitamin A, vitamin B and other nutrients. Deeply loved by people of all ethnic groups, they are exported to all parts of China. Sydney ripens in July and August of the lunar calendar and can be stored until winter, with an annual output of over 900,000 kilograms. Haidong is also rich in red apricots, peaches, plums, plums, begonia, pomegranate, papaya, rice pears and winter pears. It produces fruit all year round and is a famous fruit town.