Multiple-pulse laser shock micro-bulging experiments of T2 pure copper foils are conducted. The effects of laser power density, initial grain size and foil thickness on forming limit are investigated. Macro and micro fracture morphology of broken work are analyzed. The fracture mode of copper foils in multiple-pulse laser shock micro-bulging is discussed, and the mechanisms of four fracture modes are analyzed. Research results show that the laser power density has a significant influence on the maximum pulse number before fracture occurrence. In addition, the forming limit of foil cannot be increased through multiple-pulse forming method. Both grain size and feature size have a significant impact on the forming limit of multiple-pulsed laser shock micro-bulging. There are four fracture modes in multiple-pulse laser shock micro-bulging, that is, tensile fracture, shear fracture, mixed fracture and spallation.