The present application discloses a laser displacement sensor integrating a diffusing lens and a filter, specifically relating to the field of optoelectronic measurement. It includes: a housing main body, inside which a sensor body, a first slot and a second slot are provided; a diffusing lens is arranged in the first slot, and the diffusing lens is located at the emission window of the sensor body; a filter is arranged in the second slot, and the filter is located at the receiving window of the sensor body. The existing laser displacement sensors have the problem of non-response failures when used on inclined surfaces or high-reflective surfaces, and can also avoid false responses caused by signalcrosstalk between adjacent laser displacement sensors.