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2cm。 Laser receiver was a key component of the laser-controlled land leveling system. In order to improve the quality of the laser signal, extend the operating range, and reduce the noise, a novel laser receiver based on integrated IC was developed. Red polymethyl methacrylate was used as the material of the in-light window to reduce the background light into the laser receiver. Interference filters were used at the laser receiver to further reduce the background light. Photo-electric cells were used to transform light signal into electrical signal. Integrated operational amplifiers were used in low-noise pre-amplifier and main amplifier to amplify the weak electrical signal effectively. The wave shaping circuit and the widening circuit were employed to make the signal conditioning better and perform the signal transformation from spike pulse signal to digital TTL signal. The results of the field experiments show that the receiver works stable within 150 m for all directions. The vertical workable ranger is 28.4cm which allows the 2cm of accuracy in land leveling.