The invention discloses a drill pin inverting device. The drill pin inverting device comprises a fixed plate which is vertically arranged, and a sliding plate is arranged on the fixing plate in an up-and-down sliding mode; a chuck driving device is fixed on the sliding plate, and the chuck driving device drives a clamping plate to horizontally or vertically rotate; a drill pin with a pin head penetrating through the clamping plate is clamped on the clamping plate; an induction seat is arranged at the lower part of the clamping plate; a sensing port is formed in the sensing seat corresponding to the drill pin, and a sensor is installed on the sensing port; when the clamping plate rotates to the horizontal position, the pin head of the drill pin penetrates through the sensing port and is sensed by the sensor; a cleaning seat is further arranged below the sensing port, and the cleaning seat is used for cleaning the pin head of the drill pin. According to the drill pin inverting device, the drill pin can be synchronously cleaned while the drill pin is inverted.