Abstract: An automatic locking water bottle holder is provided, which includes a water bottle main frame, an installation adapter plate, a spring, a fixed arm, and a movable plate. The installation adapter plate is provided on the water bottle main frame, and the water bottle main frame is rotatably connected to the fixed arm through the spring. One end of the fixed arm is rotatably connected to the movable plate, the water bottle main frame and the movable plate are arranged parallel to each other. The present disclosure fixes a water bottle on the water bottle main frame by providing the spring, the fixed arm, and the movable plate that are cooperated with each other, which is both stable and beautiful, and can avoid a phenomenon of the water bottle falling off due to vibration, rendering it to be more convenient to use.