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Different moisture treatments （80%, 70% and 60% of field water holding）of summer maize soil evaporation were studied by using the conventional furrow irrigation and alternative furrow irrigation. The results showed that conventional furrow irrigation evaporation and whole growth period evaporation were greater than the alternative furrow irrigation. Within a short period after irrigation the surface soil with high moisture content, soil evaporation is larger; under the condition of meeting crop transpiration water consumption, alternative furrow irrigation reduced irrigation wetted area and thus reduced the invalid evaporation. With different furrow irrigation ways, soil evaporation and soil surface water content presented pulse fluctuations, while the deep soil moisture fluctuation is weaker; surface soil moisture content and leaf area index of soil evaporation effect are obvious, the two and the relative soil evaporation have a good relationship with exponential function. Moisture control is suitable, with alternative furrow irrigation, evaporation and transpiration water consumption decreased significantly and it is a suitable irrigation way for summer maize.