According to the principle of electromagnetic induction, the electromagnetic abrasive slurry jet device was designed. The structural design and parameter calculation of the accelerating cavity of the device were carried out. The twodimensional CAD model was established and the Gambit software was introduced into the grid division, and the fluid pressure and velocity distribution in the range of 13 mm outside the nozzle were simulated by Fluent software, and the CFD-Post software was used to process the simulation results. The results show that the radial velocity and pressure distribution in the range of 10 mm outside the nozzle are increased first then decreased; the axial velocity and pressure distribution in the range of 10 mm outside the nozzle are decreased, which is consistent with relevant literature and lays foundation for further study of the electromagnetic abrasive slurry.