Abstract: A flow adjusting device includes a fixation unit with a waterway and a button; the fixation unit is disposed with a movable shaft, a pushing rod and a spring, the movable shaft and the pushing rod can move relatively to the fixation unit, the motion direction is parallel to the flowing direction of the water in the waterway, the discharge area of the waterway is changed by the relative motion of the movable shaft and the fixation unit to adjust the flow rate, thereinto, the fixation unit, the movable shaft, the pushing rod and the spring are cooperated to form an automatic ball-point pen like movable mechanism; the button is connected to the fixation unit in a sliding way, the sliding direction of the button is vertical to that of the movable shaft, the button and the end of the pushing rod are formed a linkage construction.