Abstract: The study of winter intercropping in mulberry field was carried out on the synthetical development and utilization of mulberry field. 20 kinds of modes which were suitable for winter intercropping in mulberry field were studied. The 20 kinds of modes included 3 types (product raise type, mulberry field fertilizer type, agriculture and animal husbandry combination type), and 4 classes (intercropping vegetables class, intercropping strawberry class, interplanting green manure class and intercropping forage class). We selected suitable varieties and updated technologies for the main mode. We adopted key technologies including good quality and high yield, convenience and efficiency, comprehensive prevention and control of diseases and pests and promoted standardized management for winter intercropping in mulberry field. We also studied and established the advantage areas based on the market targets including saline processed vegetables, quickfreezing vegetables, supermarket fruits and vegetables, and those used as forage grass and for enriching the content of green manure of livestock and poultry. Through the above work, we promoted the sustainable development of leading industries including Nantong silkworm breeding, vegetables, etc. The results could guide the synthetical development and utilization of mulberry field in Jiangsu Province and the middle and lower reaches of the Yangtze River.