Abstract: Since the discovery of high-temperature superconductors with superconducting transition temperature higher than the boiling point of liquid nitrogen, studies have been focused to obtain them, which usually feature high superconducting critical temperature, low Rs and stable performance. They see considerable applications in engineering areas. The high-temperature superconducting resonator is an example. Compared with the normal resonators, the high-temperature superconducting resonator has high Q, small size, light weight, low noise, and other good qualities. It not only can be used in microwave devices, but also can be used to study the microwave properties of superconducting film or dielectric substrate material.