The blade type rotation heavy duty rodless cylinder adopts a structure that does not expand the compressed air, that is, a non-expansion type, and the working principle is as described above. The blade type rotation magnetic rodless cylinder adopts a structure that maintains the expansion stroke of the compressed air. When the rotor rotates to the exhaust port C position magnetic type rodless cylinder, the compressed air in the working room is exhausted once, and then the remaining compressed air magnetically coupled cylinder continues to expand until the rotor rotates to the output port B position for secondary exhaust.