Knob gear shifter with waterproof structure

The invention relates to a knob gear shifter with a waterproof structure, and belongs to the technical field of automobile parts. The knob gear shifter with the waterproof structure comprises a base assembly, an operation assembly and a rotary assembly, wherein a circuit board is contained inside the base assembly; the operation assembly comprises a key at least partially accommodated in the baseassembly and a ferrule rotationally arranged at the top end of the key in a sleeving mode; the key can move relative to the ferrule in the vertical direction, and an installation gap is formed betweenthe key and the ferrule; and the rotary assembly is arranged on the key in a sleeving mode, the rotary assembly can rotate relative to the base assembly, the top of the rotary assembly is provided with a first annular groove, the first annular groove is positioned below the installation gap, the bottom of the first annular groove is provided with at least a first guide hole, and the first guide hole is used for guiding li