Abstract: The three chilli pepper intercropping system,including chilli pepper-peanut,chilli pepper-soybean and chilli pepper-maize,were studied in chilli pepper demonstration area of Qiubei County,Yunnan Province.The results showed that chilli pepper intercropping system increased the contents of N,P and K in chilli pepper leaves,in general.Chilli pepper-maize intercropping system increased the contents of N,P and K in chilli pepper leaves by 12.93%,5.17% and 22.64%,respectively.Comparing to monocultures,the chilli pepper intercropping system increased plant height and fruit amounts significantly,the increases were detected ranging from 1.57%-20.89% and 3.06%-307.52%,respectively.Control effect on mosaic virus,phytophthora blight and tobacco budworm in chilli pepper ripening period were also obvious,which were detected ranging from 24.01%,6.87%-23.80% and 4.31%-36.40%,respectively.Biomass and yield of chilli pepper were also increased significantly in chilli pepper intercropping system,chilli pepper yield in the same area were detected ranging from 9.73%-53.52%.Based on study on the three chilli pepper intercropping pattern,chilli pepper-peanut(15∶5),chilli pepper-soybean(8∶2) and chilli pepper-maize(10 ∶2),will be used for large scale production and demonstration in the future.