The utility model relates to a band elimination filter technical field especially is a band elimination filter suitable for interference elimination between different operators, including metal cavity and apron, the L type groove that has the symmetry is opened at the internal middle part of wire chamber, L type inslot supports the metal banding line that is fixed with with the laminating of L type inslot wall through the polytetrafluoroethylene structure, the banded on -line parcel of metal has the inner conductor, the banded line of metal is connected with the N type through the inner conductor and connects, the N type connects through the fastener fixedly with the screw hole of the external wall of wire chamber, the screw hole passes through the outer conductor of the coaxial resonance of screw fixedly connected with part, coaxial resonance part is fixed with the coupling part through T style of calligraphy fastener, and it is internal that the coupling part is located the wire chamber, open threaded through -hole on the apron, the screw thread through -hole is through the screw that the runs through inner conductor fixed connection partial with coaxial resonance, and can be sealed with lapping with the metal cavity. The utility model discloses, simple structure, by the coaxial line direct feed, convenient design and installation.