Interfacial bonding performance and pulling-out process of basalt fiber reinforced polymer（BFRP） bars in concrete were studied by digital image correlation（DIC）. The image acquisition and digital image correlation technique were used to obtain the strain field evolution data of BFRP bars during pulling-out from concrete surface and calculate the bonding stress. Test results show that the bonding stress-strain is symmetrically distributed along the BFRP bars during the pulling-out process. With increasing pulling load， the interfacial bond stress and strain increases continuously. The maximum stresses and strains at the adhesion interface between C50 concrete and BFRP bars in the region near the loading end with the curing age of 7 d are 3.3 MPa and 0.020， respectively. Compared with freshwater river sand concrete of the same water-binder ratio， the maximum stress of bonding interface between seawater sea sand concrete and BFRP bars increases by about 19% with the curing age of 28 d. Extending the curing age effectively increases the interfacial bonding strength between concrete and BFRP bars. The interfacial bonding stress and strain decrease linearly along the loaded end to the free end， and the concrete at the loaded end is severely damaged after pulling-out， and the bonded section of BFRP bars shows partial fiber pulling-out and peeling phenomena.