[Objective] In order to address the "low yield" issue caused by no irrigation in the east Greater Khingan Range region of Inner Mongolia, high yield and high efficiency irrigation programs are needed in this region.[Methods] We took the traditional soybean as the test crop, to investigate the crop yield, water productivity and economic benefits under sprinkler irrigation system.[Results] The local agriculture model could not provide enough water for soybean growth without irrigations. The soybean yield increased by 20% when irrigated 2 times by using the sprinkler irrigation technique, but the economic benefits were not improved. The total soybean yield was the highest when irrigated 4 times by using the sprinkler irrigation technique, but the soybean crop water productivity was lower, compared to the crop irrigated by 3 times, and unnecessary waste of water resources occurred.[Conclusion] By 3 times irrigation with 200 m³/hm² quota of water in different growing periods(flowering, fruiting and seed filling periods) of soybean, the soybean production can be increased by 47.8%, and the maximum economic benefits can be obtained.