The invention provides a material-dispersing device with a high-energy liquid blast point blasting system and a dispersion method, and belongs to blasting material-dispersing devices and dispersion methods. The dispersion method includes the following steps: firstly, placing materials to be dispersed and liquid bags in a material sealed container, and secondly, connecting each liquid bag with the inner wall of the material sealed container through a soft rope, wherein two mutual-insulating electrodes are arranged in each liquid bag, the other ends of the mutual-insulating electrodes penetrate through the material sealed container and are placed outside liquid bag shell bodies and are connected with an impulse voltage generator. The impulse voltage generator is a combinational circuit device formed by a plurality of capacitors which are charged in parallel and discharged in series. The combinational circuit comprises an A storing subcircuit, a B power supply and control subcircuit and a C load subcircuit. The dispersion method has the advantages that operation of dispersing materials to be dispersed is simple, operation is safe, fast and efficient, and the problem that seeding is not conducted according to farming seasons is solved. Besides, the blasting is conducted under low temperature, thus the materials to be dispersed are not damaged, agricultural labor force is liberated, the exiting time-consuming and laborsome agricultural operations are replaced, and a great agricultural technology revolution is conducted.