The utility model relates to vehicle-mounted LED lighting devices of a power van, which comprise a box type power van carriage, wherein a concave mounting groove is formed in the lower edge of the periphery of the top of the power van carriage, and one LED lighting device is inserted into the mounting groove; two LED lighting devices are arranged on the front and the back sides of the power van carriage respectively; three LED lighting devices are respectively arranged on each side surface of the power van carriage; and the lighting devices are arranged on the periphery of the upper part of the carriage of the power van. Therefore, under the condition of absence of any light source, the LED lighting devices can provide sufficient light sources for a work site of working personnel, safe construction of the working personnel on the construction site is facilitated, and the working safety is improved.