The phosphate group presented in the starch molecule affected the pasting properties measured by RVA-viscoamylograph. When the heat was applied to the phosphorylated starch with H-bonding between molecules would be destroyed and let the absorption of water into the starch granules to form high swelled starch granules which resulted in the increasing of peak viscosity. However, the swelling of phosphorylated starch was limited since it could be broken down after high absorption of water. In contrast with the crosslinking reaction which inhibit the swelling without the breakage of starch granules therefore it resulted in the lowering of peak viscosity and breakdown. Combined modification of crosslinking and phosphorylation provided the enhance of peak viscosity. Because of the resistance to breakage of starch granules by crosslinking reaction and promotion for high water absorption ability of starch granules by the phosphorylation reaction would enhance the water absorption ability with the slow breakage of starch granules. However, the pasting properties of modified starches prepared from various concentration of STMP(0.25, 0.5, and 1% data not shown) combined with 4% STPP were also investigated, but the combination of 1% STMP and 4% STPP provided the highest peak viscosity. Therefore any degree of crosslinking by STMP was affected by the phosphorylation reaction with STPP for the promotion of the dramatic increase of the peak viscosity.