Cleaning machine and window cleaning machine

The utility model discloses a cleaning machine and a window cleaning machine, the cleaning machine comprises a machine body, the machine body is provided with a negative pressure cavity, a negative pressure channel and an air inlet, the negative pressure channel is communicated with the negative pressure cavity, the negative pressure channel is used for being connected with an air suction device, and the negative pressure cavity is used for generating negative pressure when the air suction device sucks air so as to enable the machine body to be adsorbed on a surface to be cleaned; the negative pressure adjusting mechanism is arranged on the machine body, and the negative pressure adjusting mechanism is used for changing the air inlet area of the air inlet so as to adjust the negative pressure of the negative pressure cavity. When the cleaning machine is combined with different air suction devices with different suction force, the air inlet area of the air inlet can be correspondingly changed through the negat