The　introduction　of　X-architecture　can　improve　many　performance　standards　of　the　chip　in　physical　design.　The　proposed　X-architecture　and　pervasive　multilayer　technology　make　the　global　routing　problem　more　complex.　For　this　reason,　this　paper　presents　the　following　enhancements　based　on　XGRouter:　1)　the　introduction　of　some　new　types　of　routing;　2)　the　combination　of　particle　swarm　optimization　(PSO)　algorithm　and　maze　routing　with　new　routing　cost;　3)　a　reduction　strategy　of　routing　capacity　in　the　initial　stage.　Then　the　multilayer　routing　model　is　introduced　and　the　integer　linear　programming　model　of　XGRouter　is　simplified.　Finally,　a　high　performance　X-architecture　multilayer　global　router,　namely　ML-XGRouter,　is　proposed.　The　experimental　results　on　benchmark　circuits　have　shown　that　our　proposed　ML-XGRouter　is　effective　and　superior　to　state-of-the-art　multilayer　routing　algorithms　on　overflows　and　the　total　cost　of　wirelength,　which　are　the　two　most　important　optimization　goals　for　the　multilayer　global　routing　problem.　Copyright　©　2020　Acta　Automatica　Sinica.　All　rights　reserved.