The piezoelectric resonators are the basic components for measuring the properties of piezoelectric materials. Based on the microwave network theory and characteristics of piezoelectric resonators, a method for measuring the equivalent circuit parameters of piezoelectric resonators using network analyzer and capacitance tester was proposed in this paper. The relationships between equivalent circuit parameters and resonant frequency, anti-resonant frequency and insertion loss were derived. Three kinds of piezoelectric resonator samples were made. The performance parameters of these three samples were measured by network analyzer and capacitance tester. The equivalent circuit parameters of piezoelectric resonators were calculated. Finally, the transmission curve of the measured equivalent circuit was measured by using the microwave simulation software, which was consistent with the measured curve, thus verifying the effectiveness of the method. Compared with the traditional method, the proposed method has the advantages of high-speed and simplicity.