The double-piston type heavy duty rodless cylinder cylinder has a fixed cylinder body. When this type magnetic rodless cylinder cylinder body is fixed, the load it carries is integrated with the double-piston type magnetic type rodless cylinder. Compressed air enters the two chambers of the magnetically coupled cylinder (one for intake and the other for exhaust), and the piston type magnetically coupled pneumatic cylinder drives the worktable left and right. The worktable's range of motion is equal to three times its effective stroke S. The piston type magnetically coupled rodless air cylinder takes up a lot of space and is generally used on small equipment.