The utility model relates to the technical field of lighting, and particularly discloses a quickly replaceable
LED lamp tube structure which comprises a lamp tube and a mounting seat, the lamp tube is in sliding connection with the mounting seat through a contact protective shell, a push plate is elastically connected in the mounting seat, the surface of the push plate is fixedly connected with a triangular plate, and the triangular plate is fixedly connected with the contact protective shell. A rotating block is rotationally connected in the mounting seat, a supporting block is elastically connected in the rotating block, the supporting block is in contact with the
contact protection shell, and the mounting seat is in contact with the triangular plate; the device has the beneficial effects that a
contact protection shell of a lamp tube is quickly inserted along a sliding groove, and when mounting and dismounting can be completed through rotation and resetting of a rotating block and a supporting block, a fixing plate is pressed, the rotating block and the supporting block start to rotate at the moment, so that the
contact protection shell is separated from the supporting block, and the contact protection shell falls to make contact with a triangular plate; the whole process is simple and rapid, and the lamp tube can be conveniently and rapidly detached and replaced.