The invention relates to the technical field of vehicle wipers, in particular to a wiper scraping arm device capable of being disassembled and assembled quickly. The wiper scraping arm device capableof being disassembled and assembled quickly comprises an input shaft, an output shaft, lock beads and quick disassembled and assembled sleeves, wherein a driving key is arranged on the front end partof the input shaft, and a circle of lock grooves is formed in the outer wall of the input shaft on the rear side of the driving key; a driving key groove matched with the driving key is formed in therear end of the output shaft, and the driving key is arranged in the driving key groove; lock holes are formed in the positions, corresponding to the lock grooves, on the groove wall of the driving key groove; the lock beads are arranged in the lock holes; and the quick disassembled and assembled sleeves are arranged outside the driving key groove in a sleeving mode, and the front ends of the quick disassembled and assembled sleeves are limited on the output shaft and can slide forwards in the axial direction; and the rear ends of the quick disassembled and assembled sleeves press the lock beads into the lock holes and the lock grooves.