In　this　paper,　hybrid　fibers　including　high　elastic　modulus　steel　fiber　and　low　elastic　modulus　synthetic　macro-fiber　(HPP)　as　two　elements　were　used　as　reinforcement　materials　in　concrete.　The　flexural　toughness,　flexural　impact　and　fracture　performance　of　the　composites　were　investigated　systematically.　Flexural　impact　strength　was　analyzed　with　statistic　analyses　method;　based　on　ASTM　and　JSCE　method,　an　improved　flexural　toughness　evaluating　method　suitable　for　concrete　with　synthetic　macro-fiber　was　proposed　herein.　The　experimental　results　showed　that　when　the　total　fiber　volume　fractions　(V-f(a))　were　kept　as　a　constant　(V-f(a)　=　1.5　square),　compared　with　single　type　of　steel　or　HPP　fibers,　hybrid　fibers　can　significantly　improve　the　toughness,　flexural　impact　life　and　fracture　properties　of　concrete.　Relative　residual　strength　RSI＇,　impact　ductile　index　lambda　and　fracture　energy　G(F)　of　concrete　combined　with　hybrid　fibers　were　respectively　66-80　square,　5-12　and　121-137　N/m,　which　indicated　that　the　synergistic　effects　(or　combined　effects)　between　steel　fiber　and　synthetic　macro-fiber　were　good.