Hysteretic performance tests of 12 concrete-filled steel tubular columns (4 specimens without gap and 8 specimens with circumferential gap) were carried out under combined compression-bending-shear loading. The test parameters are shear span ratio and gap ratio. The failure modes of concrete filled steel tubular column with circumferential gap under combined compression-bending-shear loading were investigated experimentally. The influence of gap on hysteretic curve, skeleton curve, stiffness and energy dissipation capacity of specimens was analyzed in detail. It is shown that the shear span ratio and gap ratio have great influence on the shear capacity, stiffness and energy dissipation capacity of the specimens, and the stiffness of specimens decreases with the increase of the shear span ratio. With the increase of gap ratio, the shear capacity and energy dissipation capacity of the specimens decrease.