The invention discloses a high-energy-rate pulse impact hydraulic-forming method and belongs to the field of high-speed formation of materials. According to the high-energy-rate pulse impact hydraulic-forming method, the advantages of high-speed impact forming and the advantages of pulse hydraulic forming are combined, and an impact body which moves at a high speed impacts liquid media repeatedly to complete incremental forming of a part. According to the process of each time of impacting, an impact power source drives the impact body to move at a high speed, the impact body which moves at a high speed impacts the liquid media, the kinetic energy of the impact body is instantly converted into the pressure energy of the liquid media, and thus rapid deformation of a workpiece is completed. According to the method, the overall output energy can be controlled accurately, so that the energy transmission rate, namely energy used for workpiece forming, is controlled accurately, and the required part shape is obtained through multiple times of pulse impact; the deformation of each pass can be controlled accurately, the forming time is short, the strain rate of materials is high (10<3>s<1->-10<4>s<-1>), the forming limit of the materials can be increased, and the mold attaching effect is good; and the high-energy-rate pulse impact hydraulic-forming method can be used for precise formation of magnesium alloy, aluminum alloy, titanium alloy and other alloys difficult to deform.