Red lettuce is also called foreign lettuce. Traditional local varieties in the suburbs of Chengdu, Sichuan have a long history of cultivation and are the main varieties planted in winter and spring. Good quality, single stem weight 600 ~ 700g, weight 1kg. Early and medium maturity, harvesting in 100 ~ 105 days after sowing. Red lettuce with silk hanging has the advantages of fertilizer tolerance, disease resistance and strong adaptability. High yield. The variety source, main characteristics, adaptability and cultivation techniques of red lettuce were introduced.