The invention discloses a method for removing carbon deposit in the regenerating process of alkane dehydrogenation catalysts. The method includes the following processes that firstly, at 50-200 DEG C, a hydrogen peroxide solution with the mass fraction being 10-30wt% is introduced into a catalyst bed at the mass airspeed being 0.1-10h<-1> to be subjected to charking, and the operation is maintained for 0.5-1 h; secondly, at 200-400 DEG C, a hydrogen peroxide solution with the mass fraction being 1-10wt% is introduced into the catalyst bed at the mass airspeed being 0.1-10h<-1> to be subjected to charking, and the operation is maintained for 0.5-2 h. In the method, the hydrogen peroxide solution in use is used for removing the carbon deposit of the catalysts, regeneration temperature is low, the carbon removing process is simple, and carbon removal is thorough; the pore structure, the active component dispersity and the dehydrogenation activity of the catalysts losing activity do not change obviously before or after the hydrogen peroxide solution is used for removing the carbon deposit.