The invention discloses a site lighting device for electric system maintenance. The site lighting device comprises a base. Wheels are arranged at the bottom of the base. A first supporting rod is arranged at the top of the base. A controller is arranged on the right side of the first supporting rod. An inductive probe is arranged at the upper end of the controller. The top of the first supporting rod is rotationally connected with one end of a second supporting rod through a rotary shaft. An angle adjuster is arranged at the joint of the first supporting rod and the second supporting rod. The other end of the second supporting rod is movably connected with a lighting device body. The lighting device body comprises a shell, convex rotary shafts, clamping blocks and an LED lamp. Clamping blocks are arranged on the inner sides of the upper end and the lower end of the shell. The convex rotary shafts are arranged at the other ends of the clamping blocks. Grooves are formed in the outer sides of the upper end and the lower end of the LED lamp. The LED lamp is rotationally connected with the convex rotary shafts. The controller is electrically connected with the LED lamp. The site lighting device for electric system maintenance is very convenient and quick to use, the LED lamp can be rotated to illuminate every corner, and construction tasks can be easily completed when people use the site lighting device.