The utility model relates to the technical field of electric power operation and maintenance, and provides a joint processing device of a temperature measurement optical cable. The temperature measurement optical cable is wound on the outer side of the cable; the accommodating box covers the outer sides of the cable and the temperature measuring optical cable; the locking assembly is used for locking or unlocking the position of the temperature measurement optical cable when the temperature measurement optical cable is wound on the outer side of the cable; the pull rod is connected with the locking assembly and drives the locking assembly to enable the temperature measuring optical cable to be switched between position locking and position unlocking; the locking assembly specifically comprises two power arms located in the containing box and two arm claw sets connected with the two power arms respectively, and the power arms and the arm claw sets are linked to lock or unlock the position of the temperature measuring optical cable. The device provided by the utility model can completely replace the traditional mode of fixing the temperature measurement optical cable by using an adhesive tape and a binding rope, and is convenient and fast to operate, durable, not easy to deform and good in stability.