The invention relates to a butt joint type rigid strip lamp free of a dark area. The butt joint type rigid strip lamp free of the dark area comprises a profile, a connection pin, an LED lamp panel anda lens. The profile is a hollow cavity with an opening in the lower portion. The lens is fixedly mounted the opening in the lower portion of the hollow cavity. The LED lamp panel is fixedly mounted in the middle of the hollow cavity. Conductive areas are arranged on the back sides of the two ends of the LED lamp panel. The connection pin is located at the joint of two rigid strip lamps and located on the back side of the LED lamp panel. When the two rigid strip lamps are connected, a shell of the connection pin is fixedly connected with the profiles, and a conductive element of the connectionpin is electrically connected with the conductive areas, so that the two rigid strip lamps are mechanically and electrically connected through the connection pin. As the connection pin is located onthe back side of the LED lamp panel, after the rigid strip lamps are connected, a connection structure which can cut off or block light emitted by the LED lamp panel is avoided, the whole rigid striplamp can emit light uniformly, the illumination intensities of all positions in a work area are consistent, no dark area is formed, and thus, the visibility and safety of the work area are improved.