Abstract: Based on the finite element theory of curved beam bearing thin shell，by means of the finite element software, a dynamic simulation of a constructive channel of beamslab system at postcast strip ,which belongs to Xinhua library project of Zhumadian city ,was conducted under loads which come from motor sport and was compared analytically with the situation where full loads work. The results showed the following: the displacement and stress of the channel under the load of the motor sport was smaller than the counterpart with the covered loads, and the difference between is nearly doubled. The displacement and stress which belong to twoside bearings and horizontal beam and slab keep minimum with the automobile moving. With the covered loads working, the maximum displacement value appears in the cross position of the oblique plate and the maximum stress value appears in the four corners of the bearing; The construction channel under the load of the Motor Sports is safer.