Results of study on re manufacturing particleboard from waste particleboard showed that board density increment contributed much to mechanical and physical properties of the re manufactured board,that glue consumption increment did have positive influence on MOR and IB of the re manufactured board,but the MOR was still lower than required product standard.The re manufatured board could reach the first grade reqirement of GB/T 4897—92 when more than 50% virgin wood particle was mixed with the recycled particles from waste particleboard.