Wooden pallet is made of with stringer and beam and mainly used for stacking and lifting of cold rolled steel. It is easily to be damaged in lifting condition. The force of three stringers wooden pallet for cold roller steel under working condition was analyzed. The influence of lifting dynamic load on the bending strength of wooden pallet was discussed. Theoretical formula of maximum intensity of stringers under different number of beam was deducted. The purpose was to provide theoretical basis for structure design of wooden pallet for cold rolled steel of different specifications and load.