Aphids are common pests. They parasitize on broad bean plants and suck plant juice, resulting in plant damage. In order to eliminate aphids, the following measures can be taken: 1 Biological control: introducing natural enemies such as ladybugs and parasitic bees can eat aphids and effectively control the growth of pests. 2. Spray the orange peel with water: peel off the orange peel, soak it in water for several hours, then filter the soaking solution, add a proper amount of water and spray it on the infected plants. Organic acids in orange peel can kill aphids. 3. Soap water spraying: cut the soap into pieces, add a proper amount of water and mix well, then spray the mixed solution on the plants. The composition of soap will suffocate aphids. 4. Manual removal: inspection of broad bean plants, manual removal and elimination of aphids parasitic on plants, especially early aphids, will help to curb the spread of pests.