Corn straw particleboard samples were manufactured with sodium silicate/phenolic resins.Effects of the resin consumption,hot pressing temperature and pressing time on physical and mechanical properties of the samples were then investigated.24 h-thickness swelling（TS）property of the samples presented a decrease trend while modulus of rupture（MOR）,modulus of elasticity（MOE）and internal bond strength（IB）of the samples showed increased and then decreased tendency,with increased resin consumption,hot pressing temperature and hot pressing time Optimized manufacturing parameters were 17% of resin consumption,180℃ of hot pressing temperature,and 20 s/mm of hot pressing time.The TS and mechanical properties of the board samples could meet the requirements of GB/T 4897-2015 for P2 type.