Abstract: The core-shell structure composites were prepared by co-extrusion technology with the wood/high density polyethylene(W/HDPE) as shell layer and the poplar laminated veneer lumber (LVL) as core layer. Both of the LVL-W/HDPE and LVL were treated with boiled-frozen-dry environment at one cycle, and the low velocity impact property was investigated at three different impact energies of 50 J, 75 J and 100 J. The results indicate that the absorption energy and damage depth of LVL-W/HDPE was decrease by 2.9% and 15.9%, respectively, compared with LVL at the impact energy of 50 J. And the decreasing magnitude of the absorption energy and damage depth are about 3.9% and 9.2% at 75 J. While the results are almost the same at 100 J. The treated results also prove that the LVL-W/HDPE has better environmental resistance as well as impact property because of the presence of the protection shell layer.