The invention discloses a cross-coupled bandpass filter with suspended strip lines, and mainly aims at solving the problem that a traditional filter cannot simultaneously achieve reduction of the insertion loss and miniaturization. The cross-coupled bandpass filter comprises a rectangular outer cavity (1), a suspended dielectric substrate (2), a Z-shaped input feeder (3), a Z-shaped output feeder (4), rectangular suspended strip line resonators (5) and U-shaped cross-coupled lines (6), wherein each of the Z-shaped input feeder (3) and the Z-shaped output feeder (4) comprises three vertical microstrip lines which are distributed on ports and the upper side and the lower side of the dielectric substrate respectively; the multiple stages of rectangular suspended strip line resonators are set into six stages which are the same in structure; each stage of rectangular suspended strip line resonator comprises two rectangular patches and metal through holes; the two rectangular patches are distributed on the upper surface and the lower surface of the dielectric substrate and are connected at one end of an open circuit through the metal through holes; and each U-shaped cross-coupled line comprises double side branches and an upper side branch which are distributed among the strip line resonators. By the cross-coupled bandpass filter with the suspended strip lines, the insertion loss and the circuit dimension of the filter can be reduced; miniaturization of the circuit is achieved; and the cross-coupled bandpass filter can be applied to a wireless communication system.