The mechanical classi-forming machine consists of two surface forming station and one core forming station. The mat is formed in classification structure in the mechanical forming machine. The two surface forming station is installed at the two ends of the flakers flow with one at the flow beginning to form bottom face layer and the other one at the flow end to form upper face layer. The glued surface flakers are distributed to the two belt conveyors and then come to the surface forming bin via the swing feeding screw conveyor. The core forming station is located in between the two surface forming station. The glued core flakers go to the core forming bin via swing feeding screw conveyor. The mat with classification structure is formed after the flakers flow goes through the mechanical classi-forming machine.