Waterproof lamp and mounting method thereof

The invention relates to the technical field of lamps, in particular to a waterproof lamp and a mounting method thereof.The waterproof lamp comprises a connecting part and a lampshade, a fixing part is arranged at the bottom end of the connecting part, the lampshade is fixedly connected to the bottom end of the fixing part, an annular groove is formed in the fixing part, and a rotating ring is arranged in the annular groove; the fixing part is sunken upwards to form a groove, a plurality of exhaust holes communicated with the annular groove are formed in the inner side wall of the groove, and a plurality of heat dissipation holes communicated with the annular groove are formed in the bottom end of the fixing part. The rotating ring is driven to rotate through the thermal driving mechanism controlled by the temperature, when the temperature in the lampshade is too high, air pressure drives a piston column to move forwards, an ejector rod enters a wedge-shaped hole in the rotating ring to enable the rotating ri