Test tube inner surface cleaning device

The invention relates to the technical field of medical test tube cleaning treatment, in particular to an inner surface cleaning device for a test tube. Comprising a rotation driving assembly, an electric telescopic connecting rod and a test tube brush tube body, one end of the electric telescopic connecting rod is fixedly installed at the output shaft end of the rotation driving assembly, and the other end of the electric telescopic connecting rod is fixedly connected with a friction transmission driving mechanism. According to the invention, when the inner surface of the test tube to be cleaned is abnormal, the torque generated by the friction force between the soft bristles and the inner surface of the test tube is greater than the torque formed by the friction force between the conical friction end and the conical friction transmission cavity groove, and the conical friction end slips in the conical friction transmission cavity groove; the purposes that when the friction force between the inner surface of