1,3-dipolar cycloaddition reaction was introduced. This reaction can be used in the modification of side chain of glycidyl azide polymer (GAP), cure of azides, and GAP propellant. It is shown that 1,3-dipolar cycloaddition is insensitive to water. Propellant based on this reaction can cure at 45-65 ℃. The problems of stability and compatibility between new curing age and high energy ingredient were solved, and low impact and firction sensitivity propellant could be obtained. As introduction of large group to the side chain, the mechanical property of this new propellant is relatively low. To improve this performance, modification crosslinking density and tacticity should be concerned.