Photovoltaic module cleaning method and cleaning robot

The invention discloses a photovoltaic module cleaning method and a cleaning robot based on the photovoltaic module cleaning method. The photovoltaic module cleaning method comprises the following steps that site information of a photovoltaic site is obtained; planning an overall cleaning path of a plurality of photovoltaic panels in the photovoltaic field according to the field information; the multiple photovoltaic panels are sequentially cleaned along the overall cleaning path, and cleaning of each photovoltaic panel comprises the following steps that surface information of the single photovoltaic panel is obtained, and the surface information comprises the dust deposition thickness; according to the surface information, the local cleaning path and the cleaning speed of the single photovoltaic panel are planned, and the cleaning speed and the dust deposition thickness are in negative correlation; and cleaning the single photovoltaic panel at least once according to the cleaning speed and along the local cl