The effects of the addition of polyvinyl acetate emulsion on the performance of hot pressed cement particleboard（CPB） was studied with Poplar particles of certain size as a raw material,Number 42.5 common silicate cement as an inorganic glue and Na,2,SiO,3, as a fast curing agent.The results were: 1) The addition of polyvinyl acetate emulsion could greatly improve physical and mechanical properties of CPB with modulus of rupture（MOR）≥8 MPa,internal bond strength（IB）≥0.4 MPa,modulus of elasticity（MOE）≥3×10,3, MPa and thickness expansion from water absorption≤2%.2) Only when the spring-back rates,after unloading,were less than 10%,CPB,with ideal physical and mechanical properties by hot a pressing method,could be obtained.