The invention discloses a waterproof magnetic grid ring module, which comprises a magnetic grid ring module body and a magnetic ring. The magnetic grid ring module body comprises a panel, a sealing gasket, a display, a PCB (printed circuit board) and a magnetic sensor assembly. A conductive rubber strip is adhered to one side of the display. The display is connected with the PCB through the conductive rubber strip. A conductive rubber key is adhered to one side of the sealing gasket that is positioned closer to the PCB. One side of the conductive rubber key, far away from the sealing gasket, is connected with the PCB. The magnetic sensor assembly is connected with the PCB through a flat cable. The inner wall of the magnetic ring is sleeved with a rotating shaft. A microprocessor, a USB (universal serial bus) interface and a power supply management chip are welded on the outer wall of one side of the PCB. According to the invention, the waterproof magnetic grid ring module is simple instructure, and the numerical value of the angular velocity can be rapidly and accurately detected. The waterproof performance is greatly improved. The electric energy can be reasonably distributed, and the cruising ability is improved. Moreover, the measured angular velocity and various data can be visually displayed. The counting and the statistics are facilitated.