Hanging rail type photovoltaic module spraying and coating robot and coating method

The invention relates to a hanging rail type photovoltaic module spraying and coating robot and a coating method. The coating method comprises the following steps that limiting wheels of walking mechanisms on the two sides of the coating robot are aligned with an upper frame and a lower frame of a photovoltaic module array, and the walking wheels are arranged on the surfaces of the frames of the photovoltaic modules; the coating robot moves in the left-right direction of the photovoltaic module through the walking mechanism, and the crawling mechanism works to drive the spraying mechanism to move up and down along a main body frame of the photovoltaic module. The spraying device has the beneficial effects that in-situ spraying can be carried out under the condition that power generation of the photovoltaic module is not affected, the crawling mechanism crawls along the main frame through cooperation of the smooth idle wheels and the driving rollers, and movement of the spraying mechanism is achieved; a motor