The utility model provides a plunger pump packing torque wrench, includes: handle (1), calibrated scale (2), pointer (3), the body of rod (4), wrench (5). Characterized by: the end of the plunger pump packing torque wrench body of rod (4) be equipped with handle (1), the inner end that is close to handle (1) is equipped with calibrated scale (2), the head end and wrench (5) the hookup of the body of rod (4) are equipped with pointer (3) parallel with the body of rod (4) with the opposite direction of wrench (5), pointer (3) through -hole (A) sensing scale (201) and digital (202) on through calibrated scale (2). The utility model is suitable for a reasonable moment of torsion is confirmed through the practical experience to the fastening of plunger pump packing, makes the elasticity of packing be in the optimum, improves packing life, practices thrift the electric energy, reduces polymer solution's waste, the environmental protection.