The present invention provides a coupling structure dielectric resonator filter. The coupling structure dielectric resonator filter can solve the problem of the conventional dielectric resonator filter, for example, the conventional dielectric resonator filter can not realize structural miniaturization and improve pass-band selectivity at the same time. The coupling structure dielectric resonatorfilter comprises a rectangular waveguide external cavity, a first dielectric resonator arranged along the Y axis direction, a second dielectric resonator arranged along the Z axis direction, a third dielectric resonator arranged along the X axis direction, annular feeder lines and radio frequency connectors. The three dielectric resonators are centrally symmetric, and the structure sizes of the three dielectric resonators are the same. The geometric centers of the first dielectric resonator and the third dielectric resonator are located at the axis of the transmission direction of the rectangular waveguide, the geometric center of the second dielectric resonator deviates from the axis of the transmission direction of the rectangular waveguide, and the deviation point is located at the angular bisector of the X axis and the Y axis. By regulating the value of the deviation amount and the deviation direction, the sizes of direct coupling and cross coupling between the resonators can be controlled, so that the purposes of controlling the bandwidth of the filter and the position of the transmission zero point are realized, and the miniaturization of the filter structure is realized.