The invention discloses a surface mount filter, which comprises a filter main body and an input-output structure arranged at two ends of the filter main body, wherein the input-output structure is a hexahedron cavity with an open lateral surface of which the edge is connected with the edge of the side wall of the filter main body and forms an integral body with the filter main body. The surface mount filter is also provided with a coaxial probe and a coupling structure; when the coupling structure is a coupling column, the lower end of the coupling column is fixed on the bottom surface of the input-output structure, while the upper end is hung in the air; and the coaxial probe passes through the lateral surface of the input-output structure to connect with the coupling column; and when the coupling structure is a coupling disc, the upper end and the lower end of the coupling disc are hung in the air, the middle part thereof is connected with the coaxial probe which passes through the lateral surface of the input-output structure. The surface mount filter has the characteristics of compact structure, flexible design, convenient processing and mounting, and the like, and is mainly applied to electronic systems with various microwave bands, in particular to the military and the civil field of radar, guided missile control and guide, communication, and the like.