Hydroisomerization　of　light　straight-chain　paraffins　to　their　branched　isomers　especially　di-branched　ones　is　considered　as　a　promising　technology　to　produce　clean　gasoline　blending　component　with　high　octane　number.　In　this　article,　we　report　a　superior　hydroisomerization　catalyst　that　is　based　on　a　SAPO-11　molecular　sieve　(SAPO-11-H)　simultaneously　with　smaller　crystal　size,　hierarchical　pore　structure　and　enhanced　acidity.　This　novel　SAPO-11-H　was　successfully　synthesized　via　a　two-stage　hydrothermal　crystallization　route　by　simultaneously　using　a　cationic　surfactant　cetyltrimethylammonium　bromide　(CTAB)　as　template　and　a　nonionic　copolymer　poly(ethylene　oxide)-block-poly(propylene　oxide)-block-poly(ethylene　oxide)　(F127)　as　crystal　growth　inhibitor.　During　the　crystallization,　CTAB　plays　roles　in　enhancing　the　acidity　and　creating　the　mesoporous　structure,　and　F127　serves　as　a　crystal　growth　inhibitor　to　control　the　crystals　size.　Compared　to　two　Pt　catalysts　supported　on　a　conventional　SAPO-11　and　a　commercial　SAPO-11,　the　SAPO-11-H　supported　Pt/SAPO-11-H　catalyst　with　the　same　Pt　loading　(0.5　wt%)　exhibited　superior　selectivity　to　di-branched　C8　isomers　and　dramatically　lower　cracking　selectivity　in　n-octane　hydroisomerization.　The　outstanding　performance　of　Pt/SAPO11-H　is　mainly　attributed　to　two　factors:　one　is　the　highly　exposed　pore　mouths　and　hierarchical　pore　structure　of　SAPO-11-H　that　benefit　the　formation　of　di-branched　isomers　and　avoid　the　cracking　of　the　resultant　di-branched　isomers,　and　the　other　is　the　enhanced　acidity　that　boosts　the　hydroisomerization　activity.