The invention discloses a scraper bucket mechanism for a telescopic arm type grille cleaner. The scraper bucket mechanism comprises a hydraulic telescopic arm, a hydraulic cylinder and a scraper bucket. The scraper bucket comprises a main scraper bucket body and a scraper bucket turning plate. The main scraper bucket body comprises a transverse strip plate and clamping plates. The clamping plates are fixed to the two ends of the transverse strip plate in the perpendicular direction of the length of the transverse strip plate correspondingly. A rotary shaft is fixed to the scraper bucket turning plate in the length direction of the scraper bucket turning plate. The two ends of the rotary are inserted into the clamping plates on the two sides correspondingly and overturn in the axial direction of the rotary shaft. The transverse strip plate is fixed to the front end of the hydraulic telescopic arm. The tail end of the hydraulic cylinder is hinged to the hydraulic telescopic arm. The front end of the hydraulic cylinder is hinged to the scraper bucket through hinged bars of the main scraper bucket body and a hinged bar of the scraper bucket turning plate. The hydraulic cylinder stretches out and draws back to drive a scraper bucket turning plate connection rod mechanism so that the rotating angle, along the rotary shaft, of the scraper bucket turning plate can be controlled. The technical problems that the turning angle of scraper buckets is limited, and the cleaning effect is poor in the prior art are solved.