This machine is a complex jaw crusher. It is fitted with a feeding hopper to make sure the feeding materials would not get spilt or lost, and a output hopper. The particle size can be regulated by regulating the width of the output mouth. This product is of reasonable structure, reliable performance, convenient adjustment, stable operation, small vibration and low voice. It is mainly used by coal, power, metallurgical, manufacturing, environmental, geological, scientific research departments for the sample preparation of coal or other materials with medium intensity.