Abstract: For further calculating stress of skeleton in bus body and the external skin of bus body have an effects on total framework, a new beam element which has three node and seven free degrees is introduced in this paper. The distortio nal effects of beam is faked account in any node of beam element. The calculating exactness to complex structure which is composed of the beam, membrance and plate is could raised by the element corperate with isoparametric element with eight node. The well performance of the beam element with three node and seven free degrees has been proved by contrasting part of the calculating solutions with testing solutions from a example of a real bus body's analysis