The invention discloses a capsule pump which consists of a pull rod, multisphere rings, and a check valve. The detail structure of the capsule is as follows: the outer diameters of two multisphere rings are sealed by welding; after the outer diameters of the two multisphere rings are sealed by welding, the inner diameter of one multisphere ring is sealed with the inner diameter of the other multisphere ring by welding to form a multisphere structure tubular shape to drive the pump to work through reciprocating; the capsule pump has simple structure, can convey fluids without motive seal, and completely overcomes the hidden safety troubles caused by leakage of the motive seal.