Abstract: The plate bending process by high frequency induction heating apparatus was analyzed with ANSYS software based on the thermal-elastic-plastic finite element analysis for the mild steel plate.Numerical results were used to qualitatively analyze the influences of the changes of material and panel boundary condition on the temperature field,final shrinkage and angular distortion,which can provide the digital support for automatic machining of ship plates.The results showed that the total stress in plate would increase,low-stress zone would decrease and the transverse shrinkage would increase when the constraint points increased at the edges of the longitude direction.At the same time,the longitudinal shrinkage and the transverse angular distortion are opposite to the transverse shrinkage trend.But the longitudinal angular distortion decreases firstly,and then increases with the increase of constraint points at the edges of the longitude direction.With the constraint being strengthened,the displacements at different directions decrease.