The invention provides a polaroid removing cutter and a polaroid removing method. The tool comprises a knife handle and a blade, wherein the blade is arranged on the knife handle; the handle comprises a body, a piston device arranged on the body and a guide tube arranged on the body; a pipeline for storing a sol liquid is arranged inside the body; the piston device is arranged in the pipeline; one end of the guide tube is communicated with the pipeline; the other end of the guide tube props against the blade; and the sol liquid stored in the pipeline is dredged in the blade. By utilizing the polaroid removing cutter and the polaroid removing method, the piston device and the sol liquid are arranged on the cutter, and the sol liquid stored in the handle is dredged on the blade by the guide tube when the polaroid is removed and flows to adhering glue to dissolve the adhering glue, so that the polaroid is easily removed, the polaroid removal time is effectively shortened, and the removal efficiency and the removal effect are improved.