The utility model discloses a slide gate nozzle for casting flow control of casting equipment of a metallurgy enterprise. A surface-pressure confirming device and an indicating device of a slide stroke of a slide plate are arranged in a mechanism of the utility model, surface-pressure online monitoring of the slide plate is reinforced, and consumption of each slide stroke of the slide plate is saved. An eight-edge tapered slide plate is used by the slide gate nozzle, the eight-edge tapered slide plate is fixed by a diagonal line, and longitudinal cracks can be inhibited to occur in use of the eight-edge tapered slide plate in slip direction. The using security of the eight-edge tapered slide plate and the mechanism and the service life of the eight-edge tapered slide plate can be enhanced.