The stainless steel lifting type adjustable weir gate consists of a frame, weir plate, screw rod, guide rail, and hoist. By driving the screw rod up and down via the hoist, the water level difference between the weir gate and the liquid surface is changed, thereby achieving the purpose of adjusting water level and flow rate. This equipment is manufactured using reliable welding technology and is directly connected to the hoist. It features a simple structure, good sealing performance, a wide adjustment range, and easy maintenance. It is suitable for irrigation, water treatment plants, flood control, wastewater treatment, and similar industries, serving to adjust water levels in tanks or control flow in channels.