The invention provides a device for uterus hemostasis. The device is provided with a catheter body; an air-in pipe is arranged on one side of the catheter body; an air-out hole is formed at the other end of the air-in pipe; a thickened saccule is arranged at the front end of the catheter body; the outer side of the catheter body is sleeved with a screw rod with a circular stop block; a fixing chock block is mounted near the air-in pipe and sleeved with a thread sleeve with a handle; the thread in the thread sleeve is corresponding to the thread on the screw rod; and a first through hole and a second through hole are formed at the front end of the catheter body. The device provided by the invention is mainly applied to the cases of induced-abortion bleeding in early pregnancy at the uterine scar, and the problem that the lower end of the existing catheter is hard to fix can be solved; meanwhile, the catheter can be adjusted and fixed according to the cervical length of the patient so that the saccule in the uterine cavity clings to the wall of uterine cavity and the uterine dead space is reduced; and moreover, the screw rod is adjusted or liquid is pumped to reduce pressure according to the bleeding quantity, and the compression hemostasis effect is remarkable without influencing normal activities of the patient.