Alpha and beta surface contamination instrument

The utility model discloses an alpha and beta surface contamination instrument which comprises a shell of an instrument body, the shell is fixedly connected with a fixing frame, the fixing frame is arranged in a U shape, the fixing frame is connected with a sliding plate through a clamping device, and a plurality of suction cups are arranged on one side of the sliding plate. According to the utility model, through the clamping device, the sliding plate is fixed and limited, the plurality of suckers are extruded towards the desktop, and the sliding plate and the desktop are fixedly arranged, so that the shell and the desktop are fixedly arranged, and transparent glass on a probe is not in direct contact with the desktop; the problem that the surface of glass is abraded when the instrument is placed is solved, when the instrument is used, the sliding plate slides, the probe is in contact with the outside, when the instrument is not used, the sliding plate slides reversely, the probe is not in contact with the o