Based on analysis of flame retardant experiment of Masson Pine( Pinus massoniana) plywood, the effect of the key factors (flame retardant consumption, veneer moisture content, adhesive consumption, pressing temperature etc.) on properties of the board were discussed. The results indicated that it is feasible to adopt flame retardant technique to the manufacture of flame retardant Masson Pine plywood. The bonding and flame retarding properties of board can meet the corresponding standard: the moisture content 6 %～14 %, bond strength ≥0.85 MPa, oxygen index 45 %～60 %, heat release rate HRR 3 ≤80 kW·min/m 2 at 2 minutes.