Abstract: The integrated thermal protective performance of the multi-fabric system used for fire-fighting suits is researched in this article.Multi-fabric systems were composed by simulating the fire-fighting suits with fabrics including Nomex,Kermel,PSA,PTFE,TPU and three-dimensional spacing flame-retardant fabric.Outer fabric′s flame-retardant performance is tested by vertical flammability test,the integrated thermal protective performance of the multi-fabric systems is tested by TPP test.The experiments reveal that the best thermal protective performance fabric system consists of PSA,three-dimensional spacing flame-retardant fabric and flame-retardant cotton fabric,which TPP value is 51.9;the most appropriate fabric system for the fire-fighting suit consists of NomexⅢA fabric,three-dimensional spacing flame-retardant fabric and flame-retardant cotton fabric,which TPP value is 50.7;three-dimensional spacing flame-retardant fabric can be used in fire-fighting suit structure and will achieve better overall protective effect and reduce firemen′s thermal load.