The invention relates to the technical field of medical syringes, and discloses an endocrine
hormone injection auxiliary device, which comprises a
syringe mechanism, a needle cylinder mechanism, a needle cylinder mechanism, a needle cylinder mechanism and a needle cylinder mechanism, and the
constant pressure mechanism is arranged on the needle cylinder and is used for providing
constant pressure to drive the cylinder
piston. According to the endocrine
hormone injection auxiliary device, a constant-pressure mechanism is arranged, based on the conversion principle of gravity and air pressure, the gravity is converted into constant air pressure by placing a weight with the fixed weight on a top light disc, and a cylinder
piston is pushed to move in a needle cylinder at the uniform speed; and the problem of unstable injection speed caused by non-uniform hand force during manual injection is avoided. Meanwhile, the moving distance of the top light disc is accurately controlled by rotating the
threaded rod, then the amount of air extruded out of the middle corrugated
pipe is determined, accurate control over the liquid
medicine output amount is achieved, and the requirements of patients with chronic diseases or the weak for accurate, stable and slow injection are met.