The invention discloses a 
crop rotation organic cultivation method for summer and autumn watermelons, vegetable 
broad beans, rice and chufas and relates to the technical field of 
crop rotation cultivation.The method comprises the first step of establishing an organic cultivation production base, the second step of conducting cultivation in a 
crop rotation mode that the rice, the summer and autumn watermelons and the vegetable 
broad beans are sequentially cultivated in the first year, the rice and the chufas are sequentially cultivated in the second year, and one 
crop rotation period is two years, the third step of conducting 
crop rotation cultivation of organic watermelons, organic vegetable 
broad beans, organic rice (the rice is cultivated two times in the first year and in the second year within one 
crop rotation period respectively) and organic chufas according to the quality requirements for organic agricultural products and production 
technical specifications and fertilizing soil through 
straw returning application and 
organic fertilizer composting.By means of the organic cultivation method, cultivation of the organic watermelons, the organic vegetable broad beans, the organic chufas and the organic rice can be achieved in the same organic cultivation production base, practicality and 
operability are high, very good social, economic and ecological benefits are achieved, and the method has wide application and popularization prospects in the middle and lower Yangtze River.