Abstract: An explosion proof lamp easy to be repaired and maintained comprises a lamp body, a metal guard covering the lamp body, a heat sinking lamp holder and a power supply box. The lamp body is installed on the lower end face of heat sinking lamp holder. The power supply box is mounted on the upper end face of heat sinking lamp holder. The power supply box comprises a box body and a cover body covering the box body. The box body is fixed to the upper end face of heat sinking lamp holder. The box body is connected to the cover body by screwed, and a slewing mechanism is provided on the side of joint of the box body and cover body. The slewing mechanism enables the box body and cover body to turn oppositely.