The invention discloses a cleaning and appearance inspection machine and its inspection process, comprising a material belt, a loading and unloading transport mechanism, a turntable, a loading and unloading station, a working station, a jig rotation drive mechanism, a jig clamping and limiting mechanism, Product cleaning mechanism, product wiping mechanism and product appearance inspection mechanism, wherein, the material belt is set on the outer part of the frame, and at least two products are placed on the material belt at intervals; the turntable is set on the frame; the loading and unloading station and the working station The positions are set at intervals along the periphery of the turntable, and the loading and unloading station and the working station are equipped with product fixtures; the loading and unloading handling mechanism is set outside the loading and unloading station; the jig rotation drive mechanism and the jig clamping limit mechanism It is set at the work station; the product cleaning mechanism, the product wiping mechanism and the product appearance inspection mechanism are respectively set at the work station. The invention fully automatically detects the appearance of the product surface, has compact structure design, high degree of automation, high detection efficiency and quality.