In this paper, TVOC emission of veneered wood-based panel and coating processing was systematically discussed. The results showed that resin content and hot-pressing temperature of veneered wood-based particle board had obvious impact on TVOC releasing. When velocity of flow was 0.02 m/s, after 10 hours experiment, TVOC concentration in the environment chamber was 263μg/m3. While velocity of flow 0.04m/s, TVOC concentration was 29 μg/m3. High-flow velocity was helpful for rapid dissemination of TVOC. The research also found after 10 hours experiment, concentration of TVOC in environment chamber is 31μg/m3, 220μg/m3 and 400μg/m3 corresponding amount of paint was 20g, 40g and 60g. The thicker the layer was, the longer the time of layer dehumidification and TVOC diffusion needed.