Abstract: he creep test of DD3 single crystal material which is made in China is carried out in order to meet the needs of creep calculation and analysis of the turbine blade made of DD3,and giving out the method of fitting creep curves according to the test's results.The creep constants,that are more exact and accord with the test curves,A,n and p of Norton formula are obtained by fitting the test creep curves and modified by finite element analysis of blade of single crystal.