Mass customization is a kind of fine-new production mode that corporations make individual customization for every customer's requirements by advanced technologies and managerial methods while the costs and time are the same as the volume-production. This paper analyzes the conception and characters of mass customization. And it reviews the current research of Process Capability Indices (PCI) of variety-and-batch production home and abroad. Volume-production and mass customization are compared in the paper. On the basis of discussion of the point estimates and lower confidence limits of SPC, it brings forward the method to fix on PCI of mass customization.