The utility model relates to a transformer substation cable trench patrols and examines the equipment, specifically is a take transformer substation cable trench of electromagnetic shield protection to tour dolly. The problem of present manpower inspection cable trench cover waste time and energy, and traditional electronic product can be because electromagnetic interference cause the technique ofthe inefficacy of electronic product in getting into the cable pit is solved. A take transformer substation cable trench of electromagnetic shield protection to tour dolly, includes the supporting baseplate that is supported by dolly power component, be equipped with the motor that is used for driving dolly power component on the supporting baseplate and to motor power supply's battery, the frontend of supporting baseplate sets up robot assembly, and dolly signal circuit board, signal antennas are installed to the supporting baseplate rear portion, subassembly and dolly control circuit boardmake a video recording, dolly control circuit board outside is covered with the housing shroud cover. Little driving license body can send radio signal, and the person of facilitating the use controls after connecting. The gripper is installed to the dolly, can realize snatching article.