Abstract: UsingBituminous coal asthe research object,the briquette was prepared with different binders.The testts were carried out by single factor.Indicators of performance testing for briquette included cold compressive strength,thermal strength and thermal stability.Then the test data were analyzed.The quality of briquette in relation to binder content was investigated and the forming mechanism of briquette was analyzed.By laboratory briquette forming tets,three kinds of briquette binders were selected:humic acid,starch and sodium bentonite.Theoretical analysis,scanning electron microscopy (SEM) detection and potential testing methods were used.The results showed that these three kinds of binders could make coal particles fully stick together and briquette could have good cold strength,thermal strength,thermal stability.Humic acid and starch are organic binders.Their adhesion and water resistance were better than those of sodium bentonite.But the thermal stability was relatively poor.Sodium bentonite as an inorganic binder had wide sources,low price and thermal stability and thermal strength are better.However the flammability was poor,it increased ash in briquette and reduced the heat of briquette.Therefore,three kinds of adhesive were compounded.At the same time they could improve the cold strength,thermal strength and thermal stability of briquette.It was easy to meet the requirements of industrial use of briquette;It was founded by SEM comparison of three kinds of binders that adding starch as a binder could form more greater amounts of different shapes and symmetrical distribution of crystals and gels.The briquette could reach higher strength;From the size of Zeta potential test to raw coal and different binders of briquette,Zeta potential of briquette for particle surface would also affect the strength of the briquette.The absolute value of the surface Zeta potential of coal particles was the smaller,and the electrostatic repulsion was the smaller,the strength of the briquette was the higher.