The invention provides solution for chemically removing carbon deposition on a high-pressure turbine blade. The solution is characterized in that the solution for chemically removing the carbon deposition on the high-pressure turbine blade is a mixture formed by an organic reagent, a surface active agent, an inorganic cosolvent and a complexing agent. The solution in the invention has the characteristics of high cleaning efficiency and easy operation in the carbon deposition removing operation of the high-pressure turbine blade. Compared with the traditional cleaning solution with 781 as a representative, the solution in the invention achieves more obvious effect and particularly achieves better effect for clearing away the special and stubborn carbon deposition. The solution in the invention can obviously increase the product qualification rate when being used in the production of an engine blade. The effect of removing the internal carbon deposition is obviously improved when a water-base cleaning agent that the solution in the invention requires to protect is utilized to chemically carry out the carbon deposition removing operation for the high-pressure turbine blade.