The invention discloses an LED illuminating lamp device convenient to fix. The device structurally comprises an LED bulb, a lampshade, a radiating barrel, a protection adjusting mechanism, two or morefixing pins and an installation fixing plate. The lampshade is in threaded connection with the center of the surface of the radiating barrel, the LED bulb is embedded to the inner side of the lampshade and penetrates through the radiating barrel to be electrically connected with the protection adjusting mechanism, the LED bulb, the lampshade and the radiating barrel are coaxial, the radiating barrel is in glued connection with the surface of the protection adjusting mechanism in a perpendicular mode, the installation fixing plate is electrically welded to the rear surface of the protection adjusting mechanism, and the fixing pins are in threaded connection with the surface of the installation fixing plate. Since the protection adjusting mechanism is arranged, a branch circuit can be started for sharing current and voltage when equipment is slightly overloaded, the equipment is forced to stop when large-range overload occurs, the equipment is better protected, current can be completelyguided into the ground when electric shock occurs, and the equipment is free of a short circuit.