In drilling engineering practice, sometimes it is necessary to increase drilling pressure for solving the problems of drilling in complicated conditions and treating accidents. One selected drilling machine only gives a constant feed pressure, but the specialists of Ukrainian National Ming University have developed a new hydrodynamic amplifier of drilling pressure based on the principles of hydrodynamics, which can solve the drilling difficulties in complicated conditions. The paper introduced the working principle of hydrodynamic amplifier（ГУОН）and the technical performance index, the comparison was made between the testing results and theoretical calculation.