A solid pulse laser laboratory bench is used to study the impact of laser energy, feed rate and kerf depth on slit surface processing quality of Juglans malldshurica, Quercus mongolica, Fraxinus mandshurica and Phellodendron amurense with thickness of 2 mm. The results show that with pulsed laser frequency of 20 Hz, laser energy of 300 mJ and kerf length of 12 mm, the kerf surface quality of Juglans malldshurica is the best. When the laser energy is 116 mJ, the kerf surface quality of Quercus mongolica is the best. The tests prove that for the same kind of wood, the increase of laser energy can reduce the molten slag on the kerf surface and improve both of the smoothness and the kerf surface quality. When the laser energy and the depth of kerf are constant, the feed rate is reduced and the processing quality of kerf surface is improved as the air-dry density increases.