The invention discloses a superconductive microwave nanometer resonant cavity which comprises a dielectric substrate, two coplanar waveguide ground planes arranged on the same surface of the dielectric surface, a coplanar waveguide transmission line central conduction band line and a nanometer cavity, wherein the coplanar waveguide transmission line central conduction band line is arranged between the two coplanar waveguide ground planes, the nanometer cavity is arranged in areas of the coplanar waveguide ground plane and is arranged on the surface of the dielectric substrate, the line width of the nanometer cavity is of a hundred nanometer level, and an opening is formed in the edge, departing from the coplanar waveguide transmission line central conduction band line, of the nanometer cavity. The opening can reduce capacitance of a circuit formed by the nanometer cavity and the coplanar waveguide transmission line central conduction band line, so as to reduce capacitance coupling; the line width of the nanometer cavity is reduced, so that dynamic inductance is enhanced, high characteristic impedance is generated, and coupling capacity between the superconductive microwave nanometer resonant cavity and a quantum system is enhanced.