Aiming at problem that high temperature of the cable intermediate joint will result in failure

but in practice

the temperature of the cable wire core cannot be directly measured

using ANSYS software to establish the steady-state temperature field distribution model for the cable intermediate joint. And the distribution of the surface temperature field in the normal operation state is simulated and analyzed. According to the simulation results

suitable monitoring points are obtained

that is

the temperature sensor is arranged in the cable intermediate joint in the form of "three points". The design scheme of on-line monitoring system for cable joint temperature is given.Based on the ZigBee protocol stack

the Zig Bee wireless communication network is constructed

and the remote transmission of temperature data is realized through general packet radio service（ GPRS）. The system has the characteristics of high reliability

strong portability and low cost.