刑事案件的侦破有许许多多的途径和手段，但无论运用何种途径和手段，都离不开联系的现点。联系是事物的普遍规律，运用它于侦查破案是成功之道。本文通过对桐乡市公安局成功侦破“9·２８”抢劫杀人案件经验的分析，从联系的角度对侦查破案进行理论性的探讨。 There are many ways and means for the detection of criminal cases. However, no matter what channels and means are used, the present point of contact can not be separated. Contact is a universal law of things, and using it to detect crimes is the way to success. This paper analyzes the experience of Tongxiang Public Security Bureau in successfully resolving the “September 28” robbery and murder cases and makes a theoretical discussion on the investigation and detection of crimes from the perspective of contact.