The pressure type stage sensor, float type stage sensor and capacitance type stage sensor are widely used in agricultural water conservancy project in China. However, there exists some drawback when they are equipped in the project with hyper concentration of sediment and swift flow, in which collecting message requires remote telemetry. It is an inevitable tendency to use modern computer technologies to explore the higher accuracy and highly adaptable devices of water level measurement in the agricultural water conservancy project. TC-301 new type stage sensor is presented in this paper, it practices new thought of simulative nerve theory, which succeeds in achieving new breakthrough in measuring water level of agricultural water conservancy project, and the application effect is good.