The invention discloses a stain removal device for a fingerprint collection screen, comprising: a scrubbing mechanism, which is arranged on the left side of the fingerprint collection screen, and includes a first switch, a base, a rotating plate, a motor, a rotating shaft, and a scrubbing head, and a support is provided on the left side of the base The rod and the right side are provided with a first magnet, the left side of the rotating plate is hinged on the base, the inner surface of the right side is provided with a scrubbing head, the outer surface is provided with a pull rod and a second magnet, and the scrubbing head is columnar, including sequentially counterclockwise The dry part and the wet part with the same diameter and the same axial length are set, and the infusion mechanism is set on the left side of the scrubbing mechanism, including the first housing, the liquid storage bottle, and the output unit. When the rotating plate turns left to the end, The telescopic sleeve extends into the liquid inlet hole; the heating mechanism, which is arranged on the upper end of the fingerprint collection screen, includes a second switch, a second housing, a fan, and an electric heating element. The invention has the beneficial effects of removing stains, increasing the temperature of the fingerprint collection screen, and thus improving the identification ability of the fingerprint collection screen.