With requirements for product of digitization, parallelization, intelligence, integration and network, the network rapid development platform for pump is built based on virtual prototyping technology. Surrounding with the integrated architecture of network rapid product development for pump, the key technologies and methods of developing a pump CAD system, building environment of virtual prototyping development, carrying out distributed cooperative design and realizing remote rapid prototyping service for pump, are discussed. The running case of the prototyping system is summarized. The practical result shows that the product development efficiency and the time-to-market speed of pump can be improved greatly through integrating the proposed technologies and methods in this system. Furthermore, that is valuable for the virtual prototype development of similar mechanical products.