Abstract: The research was based on the drip irrigation water-saving irrigation system with the material of ‘Qieza 2’,five treatments with different nitrogen application levels were set up.The effects of temperature and photosynthetic radiation on eggplant growth were also considered, and a simulation model of dry matter accumulation in eggplant in solar greenhouse which was based on the product of thermal effectiveness and photosynthesis active radiation was established, in order to provide reference for the light and temperature environment control of eggplant production in the solar greenhouse.The results showed that the RMSE of the measured and simulated dry matter accumulation of eggplant in the whole plant in solar greenhouse in F1-F5 treatment facilities was 61.41-135.37 kg·hm^-2 and the R~2 between the 1∶1 straight lines in plants was 0.997 2-0.999 6;the standard error RMSE and the R~2 between the 1∶1 straight lines in stem was 60.10-65.62 kg·hm^-2 and 0.973 2-0.988 3;the standard error RMSE and the R~2 between the 1∶1 straight lines in leaf was 57.50-122.28 kg·hm^-2 and 0.977 5-0.991 0;the standard error RMSE and the R~2 between the 1∶1 straight lines in fruit was 134.21-162.02 kg·hm^-2 and 0.982 6-0.991 2.The model had high accuracy and it could predict the dry matter accumulation in the whole plant and each organ of the eggplant under each nitrogen application treatment.