In order to study the effect of limb length ratio on the mechanical properties of Reinforced Concrete L-shaped Columns Strengthened with CFRP cloth,numerical simulation of ABAQUS with different limb length ratio is carried out. The obtained test parameters are analyzed,and the result shows:with the increase of limb length ratio,the ultimate bearing capacity decreases;the reinforcing effect of CFRP cloth on L-shaped reinforced concrete columns with larger limbs is obvious. The larger the ratio of the limb length,the larger the bearing capacity is. The tensile properties of both CFRP cloth and steel bar in the tension zone also play a full role.