The utility model aims to solve the problems that the raw material splashes during the mixing process, resulting in the environmental pollution and material waste, and discloses a high-speed mixer capable of preventing material splashing. The high-speed mixer comprises a main body and a material inlet, and a baffle arranged at the upper edge of the material inlet and fit with the material inlet. The baffle is made of a metal plate or a plastic plate, and the length of baffle edge welded with the upper edge of the material inlet is 1/4 to 2/3 of the circumference of the material inlet. The utility model can prevent the raw materials from splashing during the mixing process, to protect the environment and reduce the waste of raw materials.