Thermogravimetric　analysis　was　used　to　study　the　thermal　decomposition　kinetics　of　the　thermotropic　liquid　crystalline　polyamide　at　different　heating　rates　in　streams　of　N2　and　air.　The　mechanism　function　was　identified　with　the　kinetic　parameters　obtained　from　the　analysis　of　TG-DTG　curves　by　the　Friedman　method,　the　Kissinger　method,　the　Ozawa　method　and　the　Coats-Redfern　method.　The　most　probable　kinetic　function　of　the　thermal　decomposition　in　N2　was　Avrami-Erofeev　theorem.　The　activation　energy　is　208　kJ/mol.　The　most　probable　kinetic　function　of　the　thermal　decomposition　in　air　of　the　first　stages　was　Mempel　Power　theorem.　The　activation　energy　is　172　kJ/mol.　The　most　probable　kinetic　function　of　the　thermal　decomposition　in　air　of　the　second　stages　was　reverse　Jander　theorem.　The　activation　energy　is　111　kJ/mol.　The　lifetime　at　weight-loss　of　5%　at　different　temperature　was　deduced　by　isothermal　TG　analysis.