A new type of complex reinforcement method for steel structure seldom used in pratical engineering mainly due to lack of theoretic and experimental support. The experiment with this method for H-section steel beams and the results of that are introduced in this paper. The mechanical properties of the steel and CFRP material are given. The carrying capacity and the load-displacemengt curves of each specimen beams are obtained as well as the stress and strain of every feature points on the middle cross section of the beams. The results may provided reference for practical engineering.