Abstract: On the base of analyzing water quality in Kaifeng and studying the irrigation scheme of potable water,we analyzed the effect of different scheme of wastewater irrigation on environment using the environment capacity method,and get a conclusion on the irrigation requirement of potable and sewage when three kind of water quality had used,such as water quality on the section of King Temple in 2003,water quality standard of irrigation water,secondary effluent.Then propose some reasonable;irrigation methods,which make wastewater safety utilization on agriculture.