A kind of Mechanical circulatory support equipment, including inner shell, with arrival end, outlet end and flow path, the flow path is between arrival end and outlet end. Flow path limits longitudinal axis. The spiral case in outlet end downstream has outlet port. It including rotor, is mounted in the inner shell of spiral case upstream, and is configured to rotate around longitudinal axis. Spiral case includes inner surface, which includes close to the maximum radius at the least radius of rotor and outlet port, and maximum radius is greater than least radius.
