Novel water guide mechanism of cantilever excavator

The utility model discloses a novel water guide mechanism of a cantilever excavator. The cutting device comprises a cutting head, a cutting shaft, a telescopic arm and a floating sealing frame, frontend of cutting shaft, a cutting head is sleeved at the periphery of the cutting head; the cutting head is axially connected with the cutting shaft; the cutting head and the cutting shaft synchronouslyand coaxially rotate; the rear part of the cutting shaft is arranged in an inner cylinder at the front part of the telescopic arm; the front part of the telescopic arm is arranged in the cutting head; a cavity is formed between the telescopic arm and the cutting head; interior of cavity, a water diversion disc is arranged on the periphery of the cutting shaft and at the front end of the telescopic arm, a floating sealing frame is arranged on the periphery of the cutting shaft between the water diversion disc and the front end of the telescopic arm, a water guide hole is formed in one side face of the floating sealing