Disclosed in the present invention is a compact high-isolation dual-band dual-polarized filtering antenna, comprising a reflective floor, a low-pass filter patch antenna unit, and a high-pass filter dipole antenna unit. The low-pass filter patch antenna unit comprises a first-layer feed patch and a second-layer parasitic patch; the second-layer parasitic patch is located above the first-layer feed patch; the first-layer feed patch is provided above the reflective floor; a square gap is formed in the middle of the first-layer feed patch and the second-layer parasitic patch; the high-pass filter dipole antenna unit is nested in the middle of the low-pass filter patch antenna, and the center of the high-pass filter dipole antenna unit coincides with the center of the low-pass filter patch antenna; the high-pass filter dipole antenna unit comprises two pairs of oscillator arms and a pair of baluns; the two pairs of oscillator arms are located above the second-layer parasitic patch; the baluns are vertically inserted into the gap in the middle of the two layers of patch antennas and are connected to the reflective floor. The present invention solves the problem that antennas of two frequency bands which are nested together have strong coupling strength, and realizes miniaturization and high performance of the dual-band antenna.
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