The effects of edge treatment, sampling location, and moisture content of plywood specimen on its formaldehyde emission were discussed. Results found that: 1) Formaldehyde emission content of a plywood board was closely related to the end-edge area of the specimen, while it changed little whether the surface of the specimen was covered or not. 2) Test specimens from a same board at different locations had slight difference in formaldehyde emission. The specimens in the middle or margins locations had more formaldehyde emission than those at the other locations. 3) The moisture content of a specimen had a remarkable effect on the formaldehyde emission （content.） In a relatively low degree, the formaldehyde emission content of a specimen increased with the （increast） of its moisture content.