In　order　to　improve　the　efficiency　of　product　innovation　design,　a　product　innovation　design　process　model　was　proposed　based　on　QFD,　TRIZ　and　bionics.　First　of　all,　according　to　the　customer　demands,　the　product　quality　house　was　constructed　by　using　QFD　theory,　and　the　negative　correlation　technical　characteristics　were　mapped　to　the　corresponding　invention　principles　by　combining　the　contradiction　and　conflict　theory　of　TRIZ.　Considering　the　three　major　criteria　of　invention　principles,　the　suitable　invention　principles　were　screened　out.　Next,　based　on　the　invention　principles　by　searching　the　biological　case　base,　several　biological　examples　were　obtained.　Then,　the　functional　flow　similarity　among　the　biological　examples　and　the　design　targets　was　calculated,　and　the　bionic　prototype　with　the　highest　flow　similarity　value　was　used　as　the　bionic　prototype.　Finally,　based　on　the　established　biological　system　database,　product　system　database　and　collaborative　middleware　database,　the　product　bionic　design　scheme　was　obtained　by　using　collaborative　middleware　to　carry　out　cross-domain　and　multi-level　collaborative　mapping.　The　above-mentioned　process　model　was　used　to　innovatively　improve　the　fan　blade,　and　the　numerical　simulation　was　carried　out　with　FLUENT　software.　The　results　show　that　the　air　flow　rate　is　improved　and　the　noise　of　fan　blade　is　reduced　at　a　certain　extent.　The　feasibility　and　effectiveness　of　the　proposed　design　model　are　verified.　©　2020,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.