The working principle and structural characteristics of the claw type dry vacuum pump was introduced, and the dynamic balance state of the claw type rotor during the high speed rotation process was analyzed and experimentally studied by using the theory of the space force system. The method of subtracting the blind hole was used in different sides to adjust the dynamic balance of the rotor. Aiming at the leakage problem of vacuum pump, it was proposed to improve the vacuum degree of pump by using magnetic fluid sealing technology, and to simulate with analysis of the strength of fluid magnetic field. The vacuum pump detection system was designed and the vacuum of the magnetic fluid seal was sealed and the mechanical seal was tested. It was found that the vacuum degree of the magnetic fluid seal was better than that of the mechanical seal.