Liftable dust flushing device and cleaning robot

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a liftable dust flushing device and a cleaning robot, the liftable dust flushing device comprises an air pump, a main shell, a first magnetic piece and an ejector rod, a gas containing cavity communicated with the air pump is arranged in the main shell, and an exhaust through hole is further formed in the main shell; the first magnetic part is used for being fixed to a chassis of the cleaning robot and providing magnetic attraction force for attracting the main shell. The ejector rod is in sliding connection with the main shell, the main shell can overcome the magnetic attraction force to slide from a first position to a second position, and the ejector rod can abut against the base plate under the action of the internal and external pressure difference of the gas containing cavity; when the main shell is located at the first position, the main shell is attracted to the base plate through magnetic attraction fo