Since January, the newly approved internal and external investment projects part of the model of the machine such as shovel-type mining excavator, electric traction shearer scraper conveyor, scraper machine, and hydraulic support, large crushing station, fixed-type belt conveyor, etc., all stop the implementation of import tax exemption policy. The adjustment of import tax policy embodies the government's support for the revitalization of domestic equipment manufacturing industry, the import of key components and the return of raw materials to the enterprise's capital, which can provide the source of capital input for the technological transformation and innovation of enterprises. At the same time, in domestic equipment can meet the basic needs of the premise, to stop the import of the whole machine tax-exempt, for domestic equipment to provide a fair competition with the import equipment opportunities, can be in a certain period of time to reduce the new development of domestic equipment production cost pressure.