The invention discloses a water guiding device of a toolroom machine. A water guiding seat is mounted on the toolroom machine. The water guiding device comprises a water ball, a pressure guide sleeve, a leakage-proof component, and a pan-head screw, wherein a water spout hole penetrates through the water ball; an accommodating hole penetrates through the pressure guide sleeve, and the water ball is accommodated in the accommodating hole; a water guiding hole penetrates through the leakage-proof component and is communicated with the accommodating hole, and one end of the leakage-proof component penetrates through the accommodating hole and presses against the edge of the water ball; and the pan-head screw can be locked on a water searching seat, and the head of the pan-head screw presses against the top of the pressure guide sleeve. The water ball can rotate relative to the pressure guide sleeve to adjust the angle corresponding to the water guiding seat of the water spout hole, the liquid can be accurately injected to a target in order to achieve fast and accurate adjustment.