The invention relates to a quick mixing and cooling system with magnetic filtering. The quick mixing and cooling system comprises a steel pipe oil tank, a magnetic filter, a secondary filter, a motor pump, an air cooler and a reduction box. An oil outlet of the reduction box is communicated with one end of the steel pipe oil tank; the other end of the steel pipe oil tank is communicated with the magnetic filter; the magnetic filter is connected with an input end of the motor pump via a secondary filter; an output end of the motor pump is connected with an inlet of the air cooler; and an outlet of the air cooler is communicated with an oil inlet of the reduction box. The quick mixing and cooling system with the magnetic filtering employs the magnetic filter, can effectively cool fluid and filter impurities in the fluid, and improves liquidity of the fluid.