Inflatable and deflatable air pump

An inflatable and deflatable air pump, comprising a panel, a panel cover matched with the panel, an air chamber installed inside of the panel cover, a motor connected with the air chamber, wherein a plurality of air inlet-outlet holes are formed on the panel, a vent valve disposed on the panel cover, an impeller disposed in the air chamber and connected thereto with a rotating shaft of the motor, and two air chamber holes formed on the air chamber, which is characterized in that the inflatable and deflatable air pump further comprises a hollow cylindrical shifting switch, wherein the shifting switch is connected with a connecting linkage, and the connecting linkage is connected with a driving switch, two radial through holes perpendicular to each other and two radial half through holes perpendicular to each other, formed on the shifting switch, and a protruding stopping element is disposed on the shifting switch,

• wherein the air chamber holes comprise a first air chamber hole and a second air chamber hole, the radial through holes comprise a first through hole and a second through hole, the radial half through holes comprise a first half through hole and a second half through hole, wherein when the shifting switch is in an initial orientation, the second through hole of the shifting switch communicates the second air chamber hole with the vent valve, the first half through hole communicates the first air chamber hole with outer air, and the other first through hole and the other second half through hole are sealed, and when the shifting switch is rotated by 90 degrees, the first through hole of the shifting switch communicates the first air chamber hole with the vent valve, the second half through hole communicates the second air chamber hole with the outer air, and the other second through hole and the other first half through hole are sealed.