It　is　difficult　to　detect　defects　in　brazed　layers　on　heteromorphic　workpieces　using　traditional　inspection　methods.　Thus,　we　developed　a　non-destructive　testing　technology　based　on　heat　conduction.　We　carried　out　scanning　thermal　resistance　testing　and　analysis　for　flat　and　trapezoidal　workpieces,　and　proposed　a　method　for　evaluating　the　brazing　effect.　This　method　can　effectively　evaluate　the　quality　of　the　brazed　layer　of　workpieces　with　complex,　heteromorphic　structures.　Also,　this　method　will　allow　the　selection　of　workpieces　with　higher　quality　and　reliability　than　is　possible　with　traditional　methods.　©　2021　IEEE.