The invention discloses a bean colloidal grinder based on physical polypeptide chain protection and film prevention. The bean colloidal grinder structurally comprises a base, an electromotor, a machine seat, a material hopper, an adjusting disc, a hand shank, a discharging pipe, a grinding barrel and a circulation pipe. The bean colloidal grinder has the beneficial effects that alcohol liquid is arranged in a cavity, the heat generated by high-speed centrifugal rotation of rotor and stator in a grinding process is effectively replaced, cooling of the periphery is achieved, the situation that untreated protein is damaged at high temperature, and accordingly toxic dairy products are formed to threaten human health is avoided, a slag removing mechanism cooperates with a grinding structure, hooking thorns are utilized to hook impurities doped in diary product liquid and centrally collect the diary product impurities adhered to the equipment surface under the effect of an adsorption wall, and the situation that a layer of membrane is formed on the inner wall of the equipment to affect next usage because the diary product slag is viscous is avoided.