Clamp opening/closing device of injection pump push/pull box

The utility model provides a clamp opening/closing device of an injection pump push/pull box. The clamp opening/closing device comprises a push-pull box housing, two clamps, two reset springs, a pressing plate and a clutch, wherein the push-pull box housing comprises a first surface and a second surface; two oppositely arranged clamp grooves are formed in the first surface; each clamp comprises a clamp body and a spiral rod perpendicular to each other; the clamp bodies of the two clamps are oppositely arranged in the two clamp grooves; the spiral rods of the two clamps spirally penetrate through the bottom walls of the two clamp grooves respectively and are connected with the pressing plate built in the push-pull box housing in an abutting manner; one reset spring sleeves each spiral rod; the end, close to the pressing plate, of each reset spring is fixed on the corresponding spiral rod through a locking mechanism; the pressing plate is connected with the clutch in a driving manner. The clamp opening/closing device of the injection pump push/pull box, provided by the utility model can realize the opening/closing and stretching movements simultaneously, so that an injector pressing part can be clamped and can be seamlessly laminated to a push-pull box acting surface, to improve the injection precision of the injection pump.