The quantitative analysis of carbofuran and thiram in seed dressing was done by re-served phase HPLC with hypersil C₆H₅ column.The components were well separated by using the mixture of methanol and distilled water as mobile phase.The standard deviation was 0.11,0.04 respectively,the coefficient of variation were 0.74,0.37respectively.the recovery of two components were 99.6%～101.0%,98.4%～100.6% respectively.