Preparation method of rubber powder

The invention discloses a preparation method of rubber powder, which is applied to the field of rubber powder production. The preparation method comprises the following production steps: A1, treatingraw materials; A2, stirring ingredients; A3, heating and raising temperature: raising the temperature of the materials in a heating device for 30 to 40 min until the temperature is raised to 160 to 180 DEG C; A4, carrying out bond breaking: putting the materials which are heated to 160 to 180 DEG C into a microwave field with a frequency of 700 MHZ to 950 MHZ, wherein the reaction time is 40 to 50min and the Mooney viscosity value is 100 to 110; A5, cooling, packaging and preserving. According to the method disclosed by the invention, the prepared rubber powder has short melting time and a low melting temperature; the rubber powder has good solubility with asphalt; a waterproof roll prepared from the rubber powder has the advantages of small density, great peeling strength, good low temperature resistance and high