The invention discloses a real-time water level monitoring device for drainage projects. The monitoring device includes a mounting plate, supporting frames are arranged on the two ends of the lower surface of the mounting plate, handles are arranged on the two ends of the mounting plate, the mounting plate is connected with the handles in a rotary mode, four rectangularly distributed sleeves are arranged on the upper surface of the mounting plate, electric telescopic rods are arranged inside the sleeves, the fixed ends of the electric telescopic rods are fixedly connected with the sleeves, the telescopic ends of the electric telescopic rods are fixedly connected with the upper surface of a limit bucket, a floating ball is placed on the inner lower end of the limit bucket, a guide rod is arranged on the top end of the floating ball, a cylindrical sliding groove is formed in the middle of the upper surface of the limit bucket, and a first infrared distance meter is arranged on the inner upper end of the cylindrical sliding groove. The real-time water level monitoring device for the drainage projects is simple in structure and adjustable in height, real-time monitoring of the water level is conducted through the coordination of the first infrared distance meter and a second infrared distance meter, the measured data is safe and reliable, and the monitoring device is easy to operate, convenient to use and high in practicality.