A leading wire conveying trolley for testing a power transmission cable tower pole lightning arrester is characterized by mainly comprising a wire winding device. The wire winding device comprises a winding drum, a left baffle arranged at the left end of the winding drum and a right baffle arranged at the right end of the winding drum, wherein the diameter of each baffle is larger than that of the winding drum, two sides of each baffle are supported on a left bearing support and a right bearing support respectively through a supporting shaft, the two bearing supports are fixedly installed on a base, and walking wheels are arranged on the base. Multiple positioning holes are formed in the left side face of the left baffle and are evenly arranged around the axis of the supporting shaft, and a positioning bolt is arranged on the bearing support on the left and matched with the corresponding positioning hole formed in the left baffle. The leading wire conveying trolley enables leading wires to be easily and conveniently carried, the leading wires are not needed to be dismounted in work, and detection efficiency is greatly improved.