Sealing structure of shaft end of concrete mixer

The utility model discloses the sealing structure of the shaft end of a concrete mixer, which comprises a second shaft head guard ring fixed on the spindle of a mixer. The second shaft head guard ring is provided with a side wall spacing collar. A grooved type labyrinth sealing cavity is formed between the side wall spacing collar and a first shaft head guard ring. The spindle of the mixer is provided with a shaft head reinforcing plate. The shaft head reinforcing plate is fixedly provided with a shaft head shell. The shaft head shell is provided with a second oil filling hole. A yellow-glue locking steel frame is arranged between the shaft head shell and the first shaft head guard ring. The yellow-glue locking steel frame is provided with a yellow-glue seal ring. A first floating seal ring and a second floating seal ring are sequentially arranged on the spindle of the mixer from inside to outside. A sealing ring is respectively arranged between the first floating seal ring and the main body of a shaft lockin