The invention belongs to the technical field of medical detection and particularly relates to a funnel limit type test tube automatic classification detection device. The device includes a base, a sliding rail, a funnel, a conveyor belt motor, a driving motor, double sheaves, a lower sheave, an upper sheave, an upper limit sliding block and a conveyor belt, wherein the base is fixedly equipped with the sliding rail, one side of the sliding rail is equipped with the tunnel, and a driving shaft of the driving motor is connected with the double sheaves through a coupling. The device is advantagedin that the driving motor is utilized to drive the double sheaves and the upper and lower sheaves to cooperate and connect to drive upper and lower gears to rotate to further drive the upper small gear to rotate, and the upper limit sliding block is driven by the upper small gear through a connecting rod to realize the limit operation of a test tube inside the funnel; the conveyor belt is drivenby the lower small gear through the connecting rod to realize the limit of the test tube inside the funnel and code scanning preparation operation; in addition, a belt wheel and the conveyor belt aredriven by the conveyor belt motor to carry out the transmission work, and the function of scanning large-scale test tubes and classification of the test tubes are realized comprehensively.