Coating film detection unit and detection device

The invention discloses a coating film detection unit and a detection device, the coating film detection unit comprises a camera used for shooting a to-be-detected product, and a light source, a spray valve, a wiping block, a cloth releasing module and a cloth collecting module which are arranged below the camera, and the end part of the wiping block is provided with a wiping head used for being in contact with the to-be-detected product through wiping cloth; at least two liquid outlet hole sets distributed at intervals in the moving direction of the wiping cloth are formed in the area, close to the wiping head, of the wiping block, each liquid outlet hole set is composed of a plurality of liquid outlet holes which are arranged at intervals in the width direction of the wiping cloth and make contact with the wiping cloth, and the liquid outlet holes located in the different liquid outlet hole sets are formed in a staggered mode in the width direction of the wiping cloth. And the liquid outlet hole group is po