Is a fixed punishment good.? Nowadays, the incidence of crimes has been growing at an appalling speed, and the severity of it has been staggering to human beings society. That is why punishments are so critical in dealing with this disturbing phenomenon. It is imperative to find out the effective ways to define a certain punishment. In the first place, precaution is better than cure. A fixed punishment may bring a deterring effect on the society, it can give the criminals a second thought before they commit a crime indeed and considering the sever consequence they may give up. Furthermore, A fixed punishment stimulates the sense of security of the public, it shows them not only justice but also the government`s attitude about crimes. A danger foreseen is half avoided, clarifying the rules is the beginning of building a peaceful and stable environment. On the other hand, there are still unexpectedly exceptional cases sometimes, like self-defense killing, accidental hurt or out of control car crash. It seems like define them as real criminals and give them the same sentence is unfair, so taking their motivation and situation into to consideration and giving them the appropriate punishment are the right things to do. In addition, there have to be fixed punishment for all crime absolutely, criminals deserve to be punished after all, However, we need to make an arrangement for the mixed punishment, ranging a maximum to a minimum for different certain level of a particular crime to ensure the civilian`s rights. It shows equity that judges choose the certain sentence in the fixed scale. In sum, money, efforts and time should be put into the public security education, increasing awareness of how bad a crime it is. Less crime in the future is what we all look forward to seeing, not matter they would be punished or not.