我国公安机关是各级行政机关的组成部分 ,是国家的治安保卫机关 ,是武装性质的国家治安行政力量和刑事侦查力量 ,是负责社会治安和国内安全保卫工作的专门机关。公安机关的工作范围十分广泛。在刑事诉讼中 ,公安机关是行使侦查权的机关之一 ,大部分刑事案件的侦查活动都由公安 The public security organs of our country are an integral part of the administrative organs at all levels and are the public security organs of the country. They are armed public security administrative forces and criminal investigation forces and are the special organs responsible for social security and domestic security. The scope of work of public security organs is very wide. In criminal proceedings, the public security organ is one of the organs that exercise the power of investigating. Most criminal cases are investigated by public security