Gelation　behavior　of　binary　Pluronic　block　copolymers　of　F127/F68　was　evaluated　by　rheological　measurements.　The　results　showed　that　when　the　total　copolymer　mass　fraction　was　fixed　at　20%,　the　gel　transition　temperature　increased　from　20.8　°C　to　38.5　°C　and　the　elasticity　modulus　decreased　83.5%　with　the　weight　ratio　of　F127/F68　from　10　:　0　to　8　:　2.　The　formed　gel　was　typical　of　shear　thinning　property.　Nevertheless,　according　to　DSC　analysis,　the　critical　micelle　temperature　hardly　changed　with　the　composition　of　the　mixture,　and　the　gelation　process　was　thermo-reversible　and　no　endothermic　peak　was　detected　at　the　gel　transition　temperature.　The　hydrophilic　＂corona＂　of　the　micelle　was　studied　using　viscometry.　The　results　showed　that　the　shell　hydration　of　the　micelle　decreased　while　increasing　the　ratio　of　F68.　Particle　size　analysis　found　that　the　micelle　was　slightly　smaller　as　the　proportion　of　F68　in　the　mixture　was　increased.　The　diagram　exhibited　the　transition　process　of　the　binary　system　from　micelle　to　gel.　Increased　the　ratio　of　F127,　more　micelles　would　be　involved　in　the　formation　of　gel.　And　raised　the　temperature,　the　repulsive　interactions　among　close-packed　spherical　micelles　became　stronger.　Both　of　them　could　help　to　increase　the　micellar　volume　fraction,　which　could　benifit　to　the　gel　formation.