侦查是指享有侦查权的机关在刑事诉讼中,依照法律规定进行的专门调查工作和采取有关的强制措施的活动。从技术的角度看,侦查是侦查机关发现犯罪、证实犯罪、揭发犯罪人的专门调查活动,是侦查机关代表国家针对个人进行追诉的行为;从刑事诉讼的层面看,侦查是刑事诉讼程序的开端。从修订后的刑事诉讼法和近年来的刑事诉讼审判方式的改革实践可以看出,我国的法学理论界和实务界越来越重视刑事审判程序公正,重视人权的保护,但对侦查程序的公正却关注不够,尤其对犯罪嫌疑人在侦查过程中的合法权益的保护 Investigation refers to the activities of the organs that have the power to investigate in the criminal proceedings, the special investigations conducted in accordance with the law, and the relevant coercive measures. From a technical point of view, the investigation is the investigation of criminal investigation, criminal investigation, exposing criminals special investigation activities, is the investigation agency on behalf of the state prosecution for individuals; from the criminal litigation level, the investigation is the beginning of criminal proceedings . From the revised Criminal Procedure Law and the reform practice of the criminal procedure trial method in recent years, it can be seen that the legal theorists and practitioners in our country pay more and more attention to the fairness of the criminal trial procedure and the protection of human rights. However, the fairness of the investigation procedure But not enough attention, especially for the suspects in the investigation of the legitimate rights and interests of the protection process