In recent years, the reservation or abolition of capital punishment has become a vital issue. This study is trying to discuss the viewpoints of reservation and abolition of death penalty by each school based on the ethics of each school in pre-Chin Dynasty age, and by virtue of traditional Chinese lawful thoughts, we also discuss the above mentioned issue through different aspects. The abstract is as follows: 1. Confucius insisted on justice in return for injustice, good in return for good. If someone who thinks that it is injustice, then the argument is for fair law to decide. A lawful effect is directly to reflect what the stipulation is ruled by law. Therefore, if death sentence is ruled by law, then, it should be carried out by law righteously. It means justice in return for injustice. 2. That Xunzi insisted on the possibility of civilization to people. In view of this, he believed that punishing an offender who has been told what is the right thing to do and what is the wrong. A certain person is fully aware of killing is an illegal act, and the perpetrator must be sentenced to death. However, the offender is somewhat unexpected to accept the possibility of committing a crime intentionally. Meanwhile, the ban of punishment is the violent behavior of killing, the object of such punishment is certain person with intentional viciousness, it means capital crime. To punish those who violate the value of educational contents is proper. 3. Lao-tze believed that deep hatred still remains little hatred. If an offender who is decided to be executed death penalty and later tried to be lessened, then how to clear the grievance? 4. The purpose of Mo-tzu left worthy writings for the public interests and abolished the evil in the world. Therefore, the one who destroyed the lawful order is unable to be a person's capacity as existence. The foregoing murderer has lost his capacity to be as human being (a no person), so as to the offender who is sentenced to death is just like taking out of the evil for the world but it doesn't mean killing someone. 5. Han-Fei believed that the one who is sentenced to death and shall be a capital prisoner to be executed that is different from an innocent person who is killed by law; and the law allows to put someone to death meaning he is ought to be to put to death for justice. The end of capital sentence is to be expected a termination of killing. The laws of Tan Dynasty was applied and added to Confucius thought, and among capital sentences, Shu-Yi said that a wise ruler in the ancient age would imitate Heavens to promulgate law (regulations) and take advantage of assistance of political affairs and civilization and education to forbid violence and prevent wickedness. The goal of setting up death penalty is to tell certain people what has never been done, such as murders, and in the article of laws the murderer must be executed in front of the public to teach a lesson of never killing people, otherwise the punishment of life-deprivation would occur. Someone is fearful of death or its punishment, and once killing stops is the truthful meaning of 'originally to live a life in the law'. In case that someone who kills a person in despite of admonishment, the judge would have no choice but sentence him to death in accordance with the law. By doing so, it is not only to confirm with people the lawful effects, but also make a possible murderer without a motive of killing. See the firm of law-execution, and know that he cannot just walk free from the punishment if he kills someone, then he would stop his plan of killing someone. It makes him escape from capital sentence and stops his killing action, and on the other hand, it prevents the damage for someone from being murdered. This is the true meaning of 'finally a stop of killing' just as the aforementioned.