The dependences of the dynamic effective mass() and power dissipation p() of tungsten particles system on frequency are studied under vertical vibration excitation. It is found that there appears a sharp resonance peak in each of spectra of the real part M1 (), the imaginary part M2 () of the effective mass, and the power dissipation for a given vibrating strength. With the increase of the pressure acting on the top surface of the particle, each peak frequency of the M1 (), M2 () and power dissipation moves to higher frequency, and the peak height also increases accordingly. Further study finds that the resonance frequency fg of the real part of the effective mass satisfies piecewise power-law with the change of pressure P acting on the top surface. At low P value, the power exponent is 0.3, and at high P value the power exponent decreases to 1/6. The reciprocal of quality factor of the granular system, 1/Q, decreases exponentially with the change of pressure P.