The parallel pump is the newly developed new generation of mine self balancing horizontal multi-stage centrifugal pump. With adoption of dual-inlet design, symmetric impeller rotor components, the parallel pump has two channels collected via the outlet section before discharge, realizing parallel connection. The structure can balance the axial force of rotor components in the pump. With compact structure, no leakage, high efficiency, stable operation and strong applicability, it's a new force in self-balancing horizontal multi-stage centrifugal pumps.With big design flow and high lift, the parallel pump is a strong supplement of single-stage dual-suction horizontal centrifugal pumps and conventional self-balancing horizontal multi-stage centrifugal pumps. It's widely applied to municipal water supply projects, water conservancy projects, petrochemical projects and other projects of big flow and high lift, and can totally replace multi-stage water supply of conventional single-stage dual suction horizontal centrifugal pumps, realizing first-level drainage, greatly reducing budget and equipment operation and maintenance cost.