the experimental methods of surface coating of boron powder and the performance analyses of coated boron powder were introduced.The methods, including recrystallization, neutralization, deposition and phase separation, are suitable for coat ing boron with NH₄ClO₄, KClO₄, LiF and NaN₃. In order to characterize the performance improvement of coated boron powder, the acidity, viscosity, thermochemical properties and ignition behaviour of coated and uncoated boron powder were measured and compared,and some valuable results were obtained.