Accurately quantitative auxiliary infusion device

The invention relates to medical auxiliary instruments, and provides an accurate quantitative auxiliary infusion device in order to accurately quantify the infusion amount during infusion, which comprises a box body, a piston cylinder arranged in the box body and provided with an opening on one side, a piston plate slidably arranged in the piston cylinder, a driving device for driving the piston plate to move, and a liquid storage bag arranged in the piston cylinder, the liquid inlet pipe is arranged on the side wall of the liquid storage bag, and the liquid outlet pipe, the first guide pipe and the second guide pipe are arranged on the side wall of the liquid storage bag; a first through hole and a second through hole are formed in the side, away from the opening side, of the piston cylinder, a pricking needle is arranged at one end of the first catheter, a first one-way valve is arranged at the other end of the first catheter, and the liquid inlet pipe penetrates through the first through ...