Under the premise of micro－wetting irrigation，in order to explore the effects of different irrigation methods on the growth and development of greenhouse peppers，this experiment set up 4 different treatments，including alternate irrigation ( A treatment) ，intermittent irrigation ( B treatment) and continuous irrigation ( C treatment) and general irrigation ( D treatment) and each treatment was repeated 3 times to analyze the growth status and irrigation water utilization efficiency of pepper． The results showed that the plant growth and yield of the mild irrigation treatment group were higher than that of the general irrigation group，and the irrigation water productivity was 2．23 times，3．08 times and 2．97 times of that of the general irrigation group． The irrigation water productivity of the intermittent irrigation was the highest