[Objective] The research aimed to study the suitable planting density of the compact planting variety Qianxing 201.[Method] The influences of density on the yield and plant character of Qianxing 201 and Huidan 4 were studied with the field experiment and six levels of planting density.[Results] The results showed that the relation between yield and planting density accorded with one-place quadratic.For Qianxing 201 and Huidan 4,it was a significant negative correlation between the 1 000-grain weight and den...