To　establish　a　compression　constitutive　model　of　mixed　fiber　concrete,　polyvinyl　alcohol　(PVA)　fiber,　polypropylene　(PP)　fiber　and　steel　fiber　were　mixed　into　concrete　at　different　ratios　and　subjected　to　compression　test.　By　conducting　comparative　analysis　of　various　constitutive　models　for　hybrid　fiber　reinforced　concrete　(HFRC),　the　accuracy　was　derived　and　the　method　for　determining　the　model　parameters　was　established.　The　peak　stress,　peak　strain　and　elastic　modulus　of　different　fiber　ratio　specimens　were　fitted　and　analyzed.　Results　show　that　under　the　condition　of　2%　mixed　fiber　volume,　with　the　increase　of　the　proportion　of　steel　fiber,　the　strength　of　HFRC　increases,　the　peak　strain　slightly　decreases,　and　the　elastic　modulus　is　significantly　improved　in　the　test　piece　mixed　with　steel-PP　hybrid　fiber.　In　the　test　piece　incorporating　PVA-PP　hybrid　fiber,　the　proportion　of　PVA　fiber　increases,　the　peak　stress　and　elastic　modulus　of　the　material　are　improved,　and　the　peak　strain　is　lowered.　The　expressions　and　experiments　in　this　paper　are　in　good　agreement,　and　the　segmented　susceptible-infective-removal　(SIR)　model　has　the　highest　fitting　accuracy.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.