Using Polyethylene Glycol (PEG, molecular weight 1000), one kind of polyol, mixed with Isocyanate (PMDI, polymeric diphenymethane diisocyanate) as glue, their 5 kinds of mix ratio were 0:100, 5:95, 20:80, 35:65 and 50:50. the density of particleboard was 0.45 g/cm^3 and made from Paulownia×taiwaniana. Its modulus of rupture (MOR), internal bonding (IB), screw holding strength (SH) and dimensional stability showed the glue mix ratio at 5:95 the best.