This design aims at its organization characteristics in analyzing a MMD double-roll crusher toothed falling in pieces the foundation of mechanism, making use of a trapezoid method to deduce a calculation should grow the crusher basic parameter to estimate formula. The FP5216B strong dint ratings crusher is absorbing in great quantities advanced technical foundation at home and abroad up, design development of a kind of new, efficiently, the technique forerunner's strong dint crusher, currently already arrive international advanced level, be importing the same kind product of act for product. Special and novel structure and design method, make it have broken up strength high, the productivity is big and can consume low, lead carry to protect intelligent credibility, broken up product grain degree stability etc. advantage, and maintain to dismantle to pack convenience fast, the easy piece life span prolongs consumedly. Moreover, the perfect automation provide oil system and once automated to carry an usage of protecting the system, making this crankshaft accept of the service life raised than the past near 100%, pure block up and defend the ability of blocking up greatly in order to raise, lowered to maintain a worker to maintain labor strength, everywhere body now the design principle for making people the center; Design special machine and the FPU synchronous wheel gear box of the appropriation deceleration, let up features size not only, and made the crusher stable function get an exaltation.