Multi-stage pressure cylinder

The utility model relates to a multi-stage pressure cylinder discharging pressure or power under the action of pressure air or pressure liquid, which is the improvement of a single-stage pressure cylinder. Namely, partition rings (n to 1) (n is equal to 2, 3, 4...) are arranged in a cylinder sleeve for parting n equal distances of the cylinder sleeve into n small cylinder sleeves; n pistons are arranged on a core shaft, and separately stay in the n small cylinder sleeves; the pistons are positioned by shaft sleeves on the core shaft; a forward inlet is arranged on a right end cover; a reverse inlet is arranged on a left end cover; both sides of each of the partition rings are respectively provided with forward inlets and reverse inlets; thereby, the multi-stage pressure cylinder (the stage quantities is equal to 2, 3, 4...) is formed. The utility model has the advantages of large output pressure or power, small size, and simple manufacturing technique.