The　fractal　properties　of　four　types　of　soils　were　investigated　with　a　calculation　method　of　soil　granule　fineness　fractal　dimension　on　the　basis　of　accumulative　mass　distribution　of　soil　particle　and　experimental　results.　The　results　show　that　coarse　sandy　soil,　fine　sandy　soil,　very　fine　sandy　soil　and　coarse　sandy　soil　stabilized　by　Perma-Zyme　are　with　higher　unconfined　compression　strength　than　those　without　Perma-Zyme,　under　air　drying　condition.　In　the　study　scale　of　per　kg　soil　with　0.015　ml~0.045　ml　Perma-Zyme,　increased　the　added　volume　of　Perma　zyme,　7d　and　28d　unconfined　compression　strength　also　increased　but　got　increasing　slowly.　The　7d　and　28d　unconfined　compressive　strength　regression　models　were　chosen　and　analyzed　based　on　experimental　data.　It　was　found　that　the　soil　granule　fineness　fractal　dimension　had　more　effect　on　7d　and　28d　unconfined　compression　strength　than　the　volume　of　Perma-Zyme　by　the　3D　plots　of　equations.　7d　and　28d　unconfined　compression　strength　increased　as　soil　granule　fineness　fractal　dimension　increased　from　2.2466　to　2.5031.　The　tendency　of　increation　is　nonlinear　and　has　3　sections　(increasing,　fluctuating,　increasing　sharply).