Retractor for general surgery operation

The utility model discloses a drag hook for a general surgery operation. The drag hook at least comprises a hook body used for hooking tissue and a hollow sleeve. The end part of the hook body is inserted into the hollow sleeve; the end part and the hollow sleeve are arranged in a clearance fit or transition fit manner, so that the hook body is movably connected with the hollow sleeve; the end part is provided with a first friction layer which enables the roughness to be gradually reduced in the direction from the end top to the end bottom; a friction area is arranged on the inner wall of thehollow sleeve and provided with a second friction layer, and the roughness of the second friction layer is larger than that of the portion, except the friction area, of the inner wall of the hollow sleeve. The hook body and the hollow sleeve are arranged in a clearance fit or transition fit manner, so that the hook body and the hollow sleeve are movably connected; a first friction layer with variable roughness is arranged