Abstract: An LED lighting fixture includes a lamp seat unit, a rotary unit and a first sealing member. The lamp seat unit includes a main body that has an outer peripheral surface formed with an external thread, and an LED lamp disposed in a front end thereof. The rotary unit includes a tube body surrounding the lamp seat unit and having an inner peripheral surface formed with an internal thread engaging the external thread, and a convex lens disposed in the tube body. When the tube body is rotated relative to the lamp seat unit, the lamp seat unit is movable in the axial direction.