Plant leaf sampling detection device and method

The invention discloses a plant leaf sampling detection device and method, and relates to the technical field of plant leaf detection, the plant leaf sampling detection device comprises a grip, one side of a longitudinal guide rod is provided with an air injection dust removal assembly connected with a pulling leaf clamp, one side of the grip is provided with a moving pull rod, and the moving pull rod is connected with the grip through a moving lock piece. Through the arrangement of the moving lock piece, when the moving pull rod moves towards the grip, the moving stopping pin moves along the inclined face of the trapezoidal clamping block, and when the light source emitter and the light source receiver make contact with the blades, the moving stopping pin is separated from the inclined face of the trapezoidal clamping block; at the moment, the movement stopping pin can move to one side of the trapezoidal clamping block through the elastic restoring force of the reset spring, so that the moving pull rod is li