在司法活动中，任何一个决定或意见的提出，都绝不是机械执行法律的结果，而是在法律许可框架内的一种能动活动。而能动司法得以实现的基础，除了法律、社会生活常识和经验法则外，还有一个重要因素，那就是在每一个刑事案件处理过程中都若隐若现存在着的“刑事政策”。因此，加强对刑事政策的深入研究，必将有利于科学立法、公正司法和自觉守法的有效实现。 公诉在整个刑事诉讼过程中发挥着承上启下的关键性作用，是刑事审判活动的启动者，也是部分案件刑事诉讼程序的终结者，更是在案件进入审判程序前，有效保证案件办理质量、确保办案三个效果有机统一的重要阀门。例如，检察机关通过积极、准确适用相对不起诉，开展审前案件分流和非刑罚化处置，既可以有效减少法院审判压力、缩短诉讼周期和在押人员的羁押期限，也有利于实现刑罚的特殊预防和一般预防作用，有利于实现办案的社会效果和政治效果。近年来，随着量刑建议和认罪认罚从宽机制的逐步推开和广泛适用，进一步紧密了公诉与刑事审判之间的关系，公诉环节的某些决定对刑事审判最终结果的建议性影响作用日益彰显。因此，公诉在事实上是一个重要的刑事诉讼阶段、环节，也是一个重要的刑事法律活动。 任何一项国家治理活动都离不开政策的指引，否则就会发生方向性的错误。法律的基本概念决定了，其在具体运用、实施的过程中，必需始终服从、服务于统治阶级和国家的意志，换言之，任何刑事法律活动，都必须服从、服务于代表了统治阶级和国家意志的法律政策，不能够脱离刑事政策的指导。同理，公诉作为刑事诉讼的一个重要阶段和重要的刑事法律活动也必须始终坚持以刑事政策为指导，从而确保在具体案件办理过程中不会出现重大偏差，有效的将类案公正与个案公正有效统一起来，切实做到使人民群众从每个案件中体会到公平正义。 当前我国的刑事政策已经由原来的“严打”、“惩治与预防相结合”的政策转向为“宽严相济刑事政策”。尤其是2012年《刑事诉讼法》的修订更是突出体现了高度重视人权保障的重要理念和精神。因此，宽严相济刑事政策从2005年被提出后，到了今天，在事实上已经被立法者、司法者、法学研究者，甚至是社会公众所普遍接受。因此，在公诉环节不仅要有意识的去贯彻、适用宽严相济刑事政策，而且要确保将政策用准、用好。 关键词：刑事政策，公诉，起诉必要性

The activity of criminal justice is a dynamic course by nature, it is definitely not merely a mechanical application of criminal law for prosecutors, it is a course of "Determination" based on "comprehension" and "deduction", which will surely be connected with understanding and utilization of criminal policy. Therefore, making an intensive study of criminal policy must be propitious to realize scientific legislation, judicial fairness and law-abiding. Public prosecution plays a key role in the whole criminal procedure, which is the initiator of criminal trial activities, and also the terminator of criminal proceedings in some cases. Before the trial, the public prosecution is important to the quality and value of handling cases. For example, the prosecution's active and accurate application of relative non-prosecution, and the implementation of pre-trial case diversion and non-penalty treatment, can effectively reduce the court's trial pressure, shorten the litigation cycle and the detention period of detainees, and also help achieve special prevention of criminal punishment. And the general preventive role is conducive to the social and political effects of the case. In recent years, with the gradual introduction and widespread application of the sentencing suggestions and the lenient punishment mechanism, the relationship between public prosecution and criminal trials has been further strengthened, and certain decisions in the public prosecution have increasingly influenced the final results of criminal trials. Therefore, public prosecution is in fact an important criminal litigation phase and link, and it is also an important criminal legal activity. Any national governance activity cannot be separated from the policy guidelines. Otherwise, directional errors will occur. The basic concept of law determines that in the process of concrete application and implementation, it must always obey and serve the will of the ruling class and the state. In other words, any criminal legal activity must obey and serve to represent the ruling class and the will of the nation. The legal policy cannot be separated from the guidance of criminal policy. In the same way, prosecution as an important stage of criminal litigation and important criminal legal activities must always be guided by the criminal policy, so as to ensure that there will not be major deviations in the handling of specific cases, and that fairness and case justice will be effectively treated. Effectively unite and effectively ensure that the people understand the fairness and justice in each case. At present, China’s criminal policy has shifted from the “strike hard” and “combination of punishment and prevention” policies to the “criminal and strict criminal policy”. In particular, the revision of the "Criminal Procedure Law" in 2012 highlights the important concept and spirit that attaches great importance to human rights protection. Therefore, the criminal policy of rendering leniency to justice has been proposed since 2005. Today, it has in fact been widely accepted by lawmakers, judiciaries, law researchers, and even the general public. Therefore, in the public prosecution process, it is necessary not only to consciously implement and apply the criminal policy of combining leniency with severity, but also to ensure that policies are used accurately and well. KEY WORDS：Criminal Policy，Prosecution，Necessity of prosecution