(. The developed high-temperature superconducting filter subsystem is introduced. It consists of a 10-order high-temperature superconducting filter with phase self-equilibrium, a low-noise amplifier dedicated to low temperature and refrigeration equipment. The center frequency of the high-temperature superconducting filter is 1955MHz, the relative bandwidth is 0.51?the Sonnet simulation is selected, and it is made of double-sided Tl2Ba2CaCu2O8 superconducting film.)