The invention relates to a shaping method of a box spanner head. The shaping method is characterized by comprising the following steps of: (1) pre-striking a fabrication hole on the box spanner head according to requirements; and (2) inserting a molding knife, which is well prepared, into the fabrication hole, and pushing from top to bottom at a constant speed, so that the box spanner head is processed and shaped. The shaping method provided by the invention has the advantages of solving the problem that the wedge angle stress concentration is easy to crack, and meanwhile, improving the mechanical strength and physical property of a tool by 20-30% basically; and a copper alloy blast protection tool and a steel tool basically achieve a same level in terms of the property and the intensity.