Objective: To observe the respond of using low molecular weight heparin Calcium to resist blood concreting to dialysed patient after kidney transplant. Methods: 75 cases patients after kidney transplant were anuric or little urine which need dialyse, there were 573 times dialysis, every time used low molecular weight heparin Calcium to resist blood concreting through vas channel at the beginning. Results: No bleeding tendency got worse and no cruor in vas channel and dialytic machine in all patients. Conclution: it is a safe efficiency and convenient method to use low molecular weight heparin Calcium to resist blood concreting in dialysis after kidney transplant.