Abstract: Abstract：The anti-bending function of the reinforced concrete beam is simulated by using ANSYS 10.0 software. The modeling of reinforced concrete beam is three – dimensional. The simulated quantity includes critical loads, deflection, stress distribution, movement of neutral axis and so on. As a result, the value of the yield load and the ultimate load are consisted with the actual loads .The method may be used to simulate the load capacity of RC beams (slabs), or used in teaching of some colleges.