The invention relates to the technical field of tools for people with disabled upper limbs, and discloses an automatic hair washing machine for people with disabled upper limbs. The automatic hair washing machine comprises a base, stand columns are fixedly connected to the two ends of one side of the top of the base, driving motors are fixedly connected to the inner bottom walls of the two stand columns, first chain wheels are fixedly connected to output shafts of the driving motors through couplers, mounting bases are fixedly connected to the inner top walls of the stand columns, and second chain wheels are movably connected in the mounting bases through rotating shafts. A person with disabled upper limbs sits on a cushion at the top of a supporting plate, the head penetrates through a neck waterproof mechanism, the driving motors can drive an automatic hair washing mechanism to move up and down for adjustment to reach a height suitable for the person with disabled upper limbs, the automatic hair washing mechanism washes the hair of the person with disabled upper limbs automatically, meanwhile, the neck waterproof mechanism can discharge waste water generated in hair washing and prevent the waste water from flowing to the body from the neck and wetting clothes to make the person uncomfortable, and use is convenient.