Abstract: In order to determine pepper cultivation substrates with regional characteristics and that are better suited for promotion.Different composite substrates were prepared from slag,sand,and decomposed straw,and peppers were cultivated in trough substrates in plastic greenhouses.The plant height,biomass,yield,and physical and chemical properties of peppers in different cultivation substrates were compared to explore the effects of various cultivation substrates on the growth and yield of screw pepper.The results showed that the plant height and biomass and yield of peppers in different treatment groups exhibited a certain degree of differences.T₄ treatment group（sand:straw=3:2）,the plant height was 12.3-118.6 cm,the biomass was 26.4-91.9 g per plant,and the yield was 552-2 418 kg·（666.7 m~2）^-1,all of which were the highest,followed by the T₅treatment group（vegetable garden soil）,T₃ treatment group（slag:straw=3:2）,T₂ treatment group（slag:sand=3:2）,and finally the T₁ treatment group（slag）.The physical and chemical properties of the matrix in each treatment group also showed a certain degree of differences.The physical and chemical properties as well as the plant height and yield of the screw pepper closely followed the linear function relationship of y=a+bx（P＜0.01）,where R~2 was between 0.465 6-0.879 8.The results showed that the composite substrate of sand:straw=3:2 was better suited for screw pepper growth and is also conducive to increasing its yield.