GB/T 1934.2 - 2009 is a standard for the determination of wood swelling. It clearly stipulates the details of the preparation of wood samples, including size, quantity and other requirements. The test process is described in detail, covering the control of the Humidity environment of wood and the Measuring method of swelling change. With the help of this standard, the expansion characteristics of wood under different Humidity conditions can be accurately determined. These data are essential for the construction, furniture and other industries that use wood as raw materials, and can help enterprises to choose materials rationally, effectively predict and respond to the size change caused by the change of wood due to Humidity, and improve product mass and Stability.