In this paper,the high density tolerant maize’Zhengdan 958’ as the test material,an experimental design with a single factor and randomized blocks was used to study the relationship between planting density and yield traits of high density tolerant maize under the field planting conditions.The results indicated that the best summer planting density for high density tolerance maize varieties represented by’Zhengdan 958’was 4850 plants/667m² in Tianjin.Through the research of planting density on the effects of corn yield factors,we basically made clear the relationship between the planting density and production elements,and with the increase of planting density,how the contribution of yield elements on corn production changes.