In order to evaluatethe influence of flame-retardant melamine modified urea formaldehyde resin adhesive（IFR-MUF） on smoke characteristics of plywood, the total smoke production and smoke temperature of a veneer stack, conventionalplywood and flame-retardant plywood were studied under different heat radiation intensities. Results showed that the MUF promoted integrality of char layers, which had negative effects on smoke production in an earlier combustion process, but led to an intense smoke release in a later combustion process. The IFR had effects on smoke production of plywood, which were closely relevant to radiation intensities, and could reduce smoke temperatures significantly.