Abstract: Longshu1 (original No.C3-2)was selected and breeded with yanfen1(♀)×longyan7-3(♂)by agricultural sciences institute of longyan,fujian province , which is a high yield and quality , diseases resistance , wide adaptability sweet potato variety. It had been examined and approved by Fujian crop Variety Examination Committee in 2001 , and had passed the identification of National Crop Variety Examination Committee in 2004 , The breeding of longshu1 solves the conflict of “high quality without high yield , high yield without high quality “ betterly , which provides variety support for Strategical adjustment on sweet potato variety and quality’s structure in South China area.During the popularization of this variety , associate mode with breeding , planting , produce , processing , vendition to operate ,it has been popularized and planted 15.58 ten thousand hm2 from 2001 to the present , which have produced the enormous social economic benefits.