Many　countries　and　scholars　have　used　various　strategies　to　improve　and　optimize　the　allocation　ratios　for　carbon　emission　allowances.　This　issue　is　more　urgent　for　China　due　to　the　uneven　development　across　the　country.　This　paper　proposes　a　new　method　that　divides　low-carbon　economy　development　processes　into　two　separate　periods:　from　2020　to　2029　and　from　2030　to　2050.　These　two　periods　have　unique　requirements　and　emissions　reduction　potential;　therefore,　they　must　involve　different　allocation　methods,　so　that　reduction　behaviors　do　not　stall　the　development　of　regional　low-carbon　economies.　During　the　first　period,　a　more　deterministic　economic　development　approach　for　the　carbon　emission　allowance　allocation　ratio　should　be　used.　During　the　second　period,　more　adaptive　and　optimized　policy　guidance　should　be　employed.　We　developed　a　low-carbon　economy　index　evaluation　system　using　the　entropy　weight　method　to　measure　information　filtering　levels.　We　conducted　vector　autoregressive　correlation　tests,　consulted　60　experts　for　the　fuzzy　analytic　hierarchy　process,　and　we　conducted　max-min　standardized　data　processing　tests.　This　article　presents　first-　and　second-period　carbon　emission　allowance　models　in　combination　with　a　low-carbon　economy　index　evaluation　system.　Finally,　we　forecast　reasonable　carbon　emission　allowance　allocation　ratios　for　China　for　the　periods　starting　in　2020　and　2030.　A　good　allocation　ratio　for　the　carbon　emission　allowance　can　help　boost　China＇s　economic　development　and　help　the　country　reach　its　energy　conservation　and　emissions　reduction　goals.