In order to enhance the comprehensive properties of glycidyl azide polymer （GAP）， the fluorine-containing GAP copolymer-based thermoplastic elastomers were developed using fluorine-containing GAP copolymer as prepolymer， butylene glycol （BDO） as chain extender and the toluene diisocyanate （TDI） as the curing agent. The molecular structure， relative molecular mass， glass transition temperature， thermally stability and mechanical properties of thermoplastic elastomers were explored via FT-IR， NMR， GPC， DSC， TG/DTG， tensile test and SEM characterizations， respectively. The number-average molecular weight of the thermoplastic elastomers was determined to be 33520 g·mol^-1. The glass transition temperature （T_g） and decomposition temperature （T_d） were found to be -33.3 ℃ and 220 ℃， respectively. The tensile strength at break was 5.94 MPa， and the corresponding elongation was 886%. Therefore， the thermoplastic elastomers exhibited good thermal stability and mechanical properties. Cook-off test was employed to investigate the thermal decomposition characteristics of the fluorine-containing GAP copolymer-based elastomers/Al composite， the response temperature peak of the composite was 301 ℃，suggesting an enhanced exothermal process.