Abstract: Taking tomato as test material,the experiment design of single row and double row planting and the row spacing parameter of tomato were carried out under the condition of paper film mulching in greenhouse.The effects of different planting pattern on the growth,yield,quality and root spatial distribution of tomato were analyzed,in order to explore the suitable planting structure of tomato under paper film mulching in solar greenhouse.The results showed that under the single row planting mode,with the decrease of planting density,the single fruit weight and single plant yield increased significantly,and the lowest density treatment(3.00 plants·m^-2)had the highest yield.Under the double row planting mode,the density treatment had no significant effect on single fruit weight and single plant yield,so the highest density treatment(3.90 plants·m^-2)had the highest yield.The root biomass of tomato in 0-20 cm soil layer accounted for more than 85%of the total root biomass in the highest density treatment.The root biomass of double row planting mode was significantly higher than that of single row planting mode,and the difference was mainly in 0-10 cm soil layer.In conclusion,the yield has no significant difference between single row minimum density and double row maximum density treatment,and double row planting mode was conducived to the accumulation of root biomass.Therefore,it was suggested that 3.00 plants·m^-2 density and single row planting mode should be adopted in the cultivation of tomato over summer in Ningxia solar greenhouse.