Nano-rolled　and　nano-sheeted　silicates　were　fabricated　from　nature　kaolinite　(Kaol).　And　their　structure　was　characterized　by　Fourier　transform　infrared　spectroscopy　(FTIR),　X-ray　diffraction　(XRD),　scanning　electron　microscope　(SEM)　and　so　on.　The　two　nano-sized　silicates　acted　as　synergists　to　enhance　fire　retardant　performance　of　polypropylene　(PP)　with　intumescent　flame-retardants　(IFR)　together.　The　limited　oxygen　index　(LOI)　of　PP　is　only　18%,　incorporation　of　25　wt%　IFR　lifted　the　LOI　to　31.1%,　further　increase　to　34.5　and　35.5%　by　1.5　wt%　substitution　of　nano-rolled　Kaol　(N-Kaol)　or　exfoliated　Kaol　(E-Kaol)　with　same　amount　of　IFR,　respectively.　Moreover,　each　modified　Kaol　can　effectively　control　melt　dripping　to　help　PP　reach　UL-94　V-0　grade.　In　cone　test,　the　resultes　showed　that　the　peak　heat　release　rate　(pHRR)　values　of　PP/IFR/N-Kaol　(269　kW/m(2))　and　PP/IFR/E-Kaol　(319　kW/m(2))　composites　were　reduced　by　38.6　and　27.2%　compared　to　that　of　PP/IFR　(438　kW/m(2)),　respectively;　the　smoke　release　was　similar　to　the　heat　release.　Continue　increased　char　percentage　documented　the　promotion　on　charring　from　E-Kaol　and　N-Kaol.　The　PP/IFR/N-Kaol　exhibited　the　best　char　strength.　Morphology　observation　on　macro/micro-structure　of　char　and　real-time　FTIR　demonstrated　that　N-Kaol　can　be　beneficial　to　forming　homogenous　and　compact　intumescent　char　layer　through　＂double　effect＂　of　barrier　and　pillar-like　support　during　burning,　especially　after　340　s,　compared　with　the　PP/IFR　containing　E-Kaol.　This　special　structure　of　char　layer　can　effectively　limit　the　flow　and　transfer　of　inflammable　gases　and　heat　between　underlying　matrix　and　outside　environment.