Abstract: To study the fracture behavior of hybrid fiber reinforced ultra-high performance concrete (UHPC), three-point bending fracture tests were carried out on UHPC beams with pre-cracks. Steel fibers were mixed with six kinds of non-metallic fibers to study the effects of different kinds of hybrid fibers on the fracture behavior. The volume fraction of steel fiber was 1.3%, and the volume fraction of mixing synthetic fiber or inorganic fiber was 0.5%. The load-crack mouth opening displacement (P-D) curves were measured. The initial toughness, instable toughness, fracture energy and fracture characteristic parameters were analyzed. The bending strength and residual strength were studied. Results show that the P-D curves measured by UHPC have obvious secondary hardening characteristics, and the steel fiber and other non-metallic fibers have certain coordination crack resistance and control capability. The deformation ability of notched beams after cracking is improved by mixing synthetic or inorganic fiber. Mixing polyolefin fiber with diameter of 0.15 mm increases the fracture energy. The fracture resistance of UHPC can be improved by mixing PVA fiber with diameter of 0.04 mm. Mixing glass fiber can improve the fracture properties of UHPC, and its length should not exceed 12 mm. The diameter of polyester fiber should not exceed 0.75 mm. The non-metallic fibers with higher elastic modulus can improve the fracture resistance of UHPC.