The utility model discloses a deep retractor for an extraperitoneal operation. The kirschner wire hook comprises a first handle part, a second handle part and a hook part, one end of the first handlepart is connected with one end of the second handle part at an included angle of 80-100 degrees, the other end of the second handle part is connected with the hook part, the first handle part is provided with a plurality of kirschner wire positioning pipes in the length direction, and the bending direction of the hook part corresponds to the wire feeding direction. According to the retractor provided by the utility model, the problem that the traditional abdominal cavity retractor blocks the surgical field is avoided, the stability of the retractor is further improved by additionally arrangingthe kirschner wire positioning tube and fixing the kirschner wire on the vertebral bone wall, the burden of an assistant can be further reduced, and the retractor is beneficial to smooth surgical operation of an operator.