Abstract: The low utilization efficiency of civil bulk coal and the large amount of pollutants produced in the combustion process are also one of the important reasons for haze. Promoting clean briquette is an effective way to control bulk coal. In order to study the optimum preparation conditions of rod-shaped coal pellets,with Pulverized Coal from the Nantun coal mines of Yankuang Group as raw material,the0-5 mm raw coal powder was prepared by hammering pulverizing system,and the ZLSP200 A flat die pelletizer was used to produce rodshaped coal pellets. The effects of raw material moisture,particle size distribution,mold taper angle and binder type and amount on crushing strength of rod briquette were experimentally studied. The results show that the moisture in the raw coal can wet the surface of pulverized coal particles and a stable bridge force is formed between pulverized coal particles during extrusion forming process. It also plays a lubricating role. When the moisture content of the raw coal is 15%,the briquetting process is smooth,and the initial strength of rod briquette is the highest. The too low moisture content cannot form or plug the die holes,and the too high moisture content cannot meet the storage and transportation requirements of rod briquette due to insufficient initial strength,deformation,adhesion. When the particle size distribution modulus( Gates-Gaudin-Schutzmann equation) is less than 0. 3,it can be found by electron microscope that fine-grained pulverized coal is compactly filled between coarse-grained pulverized coal,and the contact between pulverized coal particles is close,and the bridging force and meshing force between particles are strong,the strength of rod briquette reaches over 90%. It was found that although the pellets strength of rod-shaped briquette increases slightly with the mold cone angle,but the change of cone angle will lead to the increase of the component force of roller pressure in the direction perpendicular to the cone surface,and the component parallel to the cone becomes smaller and the friction is increased in forming process. With the increase of energy consumption and die wear,the briquette crushing strength and production smoothness should be taken into account in production,and the optimum mold cone angle is 16 degrees. Theuse of the binder can greatly improve the strength of the pellets,the best performance-price ratio is between 2% and 3%. From the TG curves of rod-shaped coal pellets with different binders,it can be seen that the organic binders can reduce the burning point of rod-shaped coal pellets and promote combustion process. Inorganic binders can increase the burning point of rod-shaped coal pellets,reduce the burning rate,increase the burnout temperature,increase the ash content,decrease the ash melting temperature and inhibit the combustion process. Considering the costs and its effects on pellets energy content and thermal stability,the comprehensive analysis about the binder type and adding amount are recommended.