The utility model relates to a storage battery cable connector protective sleeve, which is provided with a corrugated pipe shaped plastic expansion pipe and a thermoplastic pipe, wherein one end of the plastic expansion pipe is provided with a circular pipe shaped connector, and the connector is inserted into one end of the thermoplastic pipe so as to realize connection of the thermoplastic pipe and the plastic expansion pipe. The storage battery cable connector protective sleeve can effectively prevent short circuit from occurring in a detached storage battery cable connector, avoids failures, which are caused by the short circuit, of high-frequency switching power supply equipment connected with a storage battery cable, and ensures safe operations of electric power communication equipment. The storage battery cable connector protective sleeve realizes assembly with the storage battery cable connector by using the thermal shrinkage performance of the thermoplastic pipe, and has the characteristics of simple structure and convenient assembly.