The slitting and cutting process of slitting and cutting board exists in the crack of up and down stream. As for the above steel mills, the steel traders have no pricing power. As for the lower class users, the steel traders have to pay the capital in advance and bear the risk of price inversion. The steel plant also adopted the down stream property chain extension technology, which is undoubtedly a severe challenge to the slitting and cutting processing.At this stage is the "buyer's age", the lower class users' right to speak is strengthened, and the pressure brought by steel traders is put on them. In order to seize orders, steel traders will undoubtedly adopt some price wars to usurp orders, which will undoubtedly infringe on the profits of steel traders and lead to the situation of slitting, cutting and processing.