In order to reveal the relationship between surface of plow and soil, the feasibility of using the sensors to test the force on the plow surface was discussed. 11 sensors were packaged in the self-isolation boxes and arranged in the surface of plow to form a sensor array. And then the system was put into the paddy soil for testing. The result showed that proposed method met the practice demand. The data showed that the maximum load was on the plowshares spade, and the minimum load was in the area of the transition from plowshare to the wall.