Retractable slide block spear

The invention discloses a returnable sliding block spear, relates to the field of mining equipment, and solves the problem that when an existing returnable sliding block spear is used, a slip is prone to being stuck, the returnable sliding block spear comprises an upper connector, a spear fishing mechanism and a retreating mechanism, one end of the upper connector is fixedly connected with a spear rod, and the spear fishing mechanism comprises a sliding frame, the slip and a sleeving pipe; a guide groove is formed in the side face of the spear rod, the retreating mechanism comprises a sliding block, a limiting piece and a driving pipe, and according to the retreating type sliding block spear, the multiple sets of sliding frames are conveniently and synchronously driven to ascend and descend through ascending and descending of the sleeving pipe, so that the sliding frames obliquely slide in the guide groove, the distance between the slips and the inner wall of a fish is controlled, and automatic clamping and f