The invention provides a sensor fixing structure, a compressor and an air conditioner unit. The sensor fixing structure comprises a first pipeline and a second pipeline, and further comprises a fixingblock and a connection pipe; the fixing block is fixedly arranged on the first pipeline; and a sensor fixing hole is formed in the fixing block. According to the sensor fixing structure, the compressor and the air conditioner unit, the connection pipe and the fixing block are separately arranged on the L-shaped first pipeline and second pipeline; when the first pipeline vibrates and drives the second pipeline to swing, welding breaking and the like do not occur at a connection part between the connection pipe and the second pipeline, so that the structural reliability of the connection pipe connection part is effectively protected; and besides, a sensor can be fixed and damped from 6 degrees of freedom by utilizing the fixing block and the connection pipe, so that the excitation force ofthe component is lowered, and the design reliability of the component under a dynamic load is ensured.