Sealing structure and stirring tank thereof

The utility model provides a sealing structure and a stirring tank thereof, the sealing structure comprises an outer shell and a stirring tank liner located in the outer shell, one side of the outer shell is provided with a driving assembly, a helical ribbon stirring shaft is rotatably matched in the stirring tank liner, the output end of the driving assembly is fixedly provided with a transmission shaft, and the transmission shaft is fixed with the helical ribbon stirring shaft. A support frame mounting bottom plate is arranged on one side of the stirring tank liner; and a mechanical sealing assembly and an internal sealing assembly are arranged between the transmission shaft and the support frame mounting bottom plate. According to the utility model, the connecting part between the stirring tank liner and the transmission shaft can be subjected to double sealing, so that leakage is prevented, the sealing effect is improved, and leakage of the stirring tank is prevented; and automatic clamping can be achieve