Flushing and baking are conventional methods to decrease the amount of VOCs in the carpet before residents begin to use the carpet indoors. However, in this paper, a new numerical model that can predict the VOCs emission from a multi-layer carpet with the existence of VOCs-adsorbing particles is to be developed, dispensing with flushing and/or baking. A new multi-layer carpet including VOCs is installed on the top surface of an air-flowing channel. The influences of diffusion coefficient, material thickness, partition coefficient and particles on the airside VOCs concentration and VOCs emission from the carpet are investigated in detail. Commercial software FLUENT 12.0 is employed to solve the continuity, momentum, turbulence and concentration equations. Results show that the middle layer may act as a source of the bottom layer when VOCs only exists in the middle layer. And in this case, the bottom layer becomes a barrier layer which can reduce the emission rate of VOCs from the middle layer. A small thickness of the bottom layer may increase the rate of VOCs emission into the air, which helps to decrease the amount of VOCs in the carpet before it is used indoors. A low partition coefficient and a high diffusion coefficient can also enhance the VOCs emission from the carpet. Besides, in the cases with particles in the air, it is found that the concentrations of VOCs in the air significantly decrease due to the particles’ adsorption of VOCs and the rate of VOCs emission from a multi-layer carpet can be increased at the same time. In summary, the present model can be used to investigate the factors which can increase the VOCs emission from a multi-layer carpet before the carpet is furnished indoors.