Using‘Jinta’as the test material, effects of different conditions of water and fertilizer on hot peppergrowth, photosynthetic performance and yield were studied in the experiment. The results showed that when the irri-gation low limit values for 70% of field water holding capacity and nitrogenous fertilizer rate was 12.5 kg/667m², andpotassium fertilizer 17.5 kg/667m², dry matter accumulation, net photosynthetic rate and yield were significantlyhigher than other water and fertilizer treatments, which were 23.22% and 10.15% and 10.15% higher than that ofthe control, respectively.