Since the scientific research project of "Research and Development of Technology and Equipment for the Second Generation New Dry Process Cement Production Line" was officially launched in 2012, breakthroughs have been made in low energy consumption burning technology of cement. Reynolds stress model with anisotropic treatment was used to study the separation efficiency, pressure reduction and heat transfer mechanism of the cyclone. A combined preheater with weak vortex and low resistance and multi-stage reconstruction was developed. The outlet temperature of the preheater was less than 260℃ and the pressure was less than 5 200Pa. The self-developed CFD test platform for calciner solves the well-known technical problem of pole processing under unstructured grid in cylindrical coordinates in computer simulation development, realizes 360° full-field simulation of flow field, particle field, temperature field and component field. The self-denitrification gradient combustion decomposition furnaces developed by this model and denitrification air ducts can pass through three tertiary air distribution. The amount of ammonia in SNCR can be reduced to less than 0.6m3/h. The three-dimensional simulation technology of the cooler can qualitatively guide the research and development work. The porous medium heat transfer model can qualitatively study the position and shape of the air intake. This part of the work is original work, which has not been reported at home and abroad. The optimized total blast volume of the fourth generation cooler is 1.872 0 Nm3/kg clinker, the heat recovery efficiency is up to 75%, and the residual heat power generation of the cooler of the middle roller crusher is up to 18 kWh/t clinker. The cement kiln system with integrated application technology achieves 2 694.0kJ/kg clinker with self-denitrification efficiency of more than 50%, and coal saving rate is more than 10% compared with the admittance value of new enterprises according to energy consumption quota standard. Taking the 2×5 500t/d production lines of M plant as an reference, each year it can save 58.2 thousand tons of standard coal, generate 90.75 million kWh from the waste heat recovery, reduce 158 thousand tons of CO2 emission and 1 000 tons of NOx emission, making 100 million CNY of increased profits. Individual technologies are used in technological renovation projects to increase production, save energy and reduce emissions.