公安机关和检察机关在办案过程中,经常涉及到应由对方管辖的案件。对此类交叉案件的处理,有关规定确立了移送原则、为主原则、为先原则和酌情自侦原则。文章就这些原则的理解和执行作了简要的分析。 Public security organs and procuratorial organs in the handling of cases, often involving the case should be under the jurisdiction of the other party. The handling of such cross-border cases, the relevant provisions of the establishment of the principle of transfer, as the main principle, as the first principle and as appropriate, self-detection principle. The article gives a brief analysis of the understanding and implementation of these principles.