The whole wood plastic composite extrusion line controls through Siemens PLC program. Vacuum cooling calibrating case equipped with vacuum pumps and circulating water save energy cooling system. The case set with shifting instruments of up and down, left and right, forward and backward, as well as adjusting incline device. Blowing water equipment can dry products and protect caterpillars of tractor from corrosion. The case could be chosen 4M, 6M,8M or 10M length as the requirement of products sections.