Objective: CPR should be performed immediately after cardiac arrest without the special exceptions. If CPR don`t help the recovery of heart function and if the patient don`t want CPR in advance, withholding and withdrawal of CPR can be justified. Domestic practical conditions and environments of EMS prevent two requirements from being satisfied. This paper addresses the possible steps for withholding and withdrawal of CPR and the requirements to each step. Methods: We reviewed the related literatures and formed the decision making model in withholding and withdrawal of CPR from prehospital to post-cardiac -arrest-syndrome care. We showed the entire CPR flow, the possible steps and requirements not to resuscitate. Results: Physician`s medical directions are necessary in prehospital phase. In early hospital phase, to withdraw CPR would be on the physician`s judgement for the patient`s life interest as well. Physician should consider the patient`s value and non-medical factors in later CPR phase. We made the model ``decision making in withholding and withdrawal of CPR in the emergency department``. The first stage, we should consider whether CPR would help the recovery of patient`s cardiac function. We can apply Hayes` clinical model. The second stage, the survival and outcome should be estimated. We can apply Mohindra`s medical factual matrix. Third stage, According to uncertainty and the agreement on the therapeutic goal between physicians and surrogates, the case falls into 4 categories. The four stage, without agreement between physicians and surrogates, multidisciplinary team and surrogates would make shared decision. Conclusions: There should be the different requirements to each step for withholding and withdrawal of CPR. The institution`s modeling of decision making CPR can be complementary to the present system.