To shear strength of the Structures is one important topic of civil lesson. Most of the researches in Taiwan are focus on Column Confinement and the Moment of Beam. There is nothing much talking about shear strength effect or analysis shear strength. For RC Rectangle Beam without Web Reinforcement, the purpose of this research paper is to discuss all kinds of CFRP paste type on RC Rectangle Beam without Web Reinforcement’s effect of shear strength. I try to use two different kinds of beams to do this research, compare the two different sizes of the beams. By this experiment, we get different destroys on beams and get the relation of CFRP paste type on RC Rectangle Beam without Web Reinforcement. We get the simple formulas of shear strength of CFRP paste type after experiment.