The invention discloses an automatic washing, disinfecting and classifying device of surgical knife handles. The device comprises a machine body. The surgical knife handles are slidingly connected into entering passageways, rotary shafts drive rotary blocks to rotate, the rotary blocks drive compression springs, sponge cushion plates and the surgical knife handles to rotate to be washed, the surgical knife handles are transported downwards through a clamp mounted on a threaded screw in a threaded manner, thus, damage to the surgical knife handles by impact force generated by gravity can be reduced, the surgical knife handles are fixed through sponge grooves, the breakage rate of the surgical knife handles is reduced, the angles of washing spaces are controlled through traction ropes, the angle controllability is higher, the weights of the surgical knife handles are measured through a weight precise measuring instrument, the surgical knife handles are classified, and the implementability is high.