The　Internet　of　Things　realizes　the　interconnection　of　every　thing.　With　the　development　of　the　Internet　of　Things,　the　scale　of　the　Internet　of　Things　is　getting　larger　and　larger,　and　there　are　often　multiple　Internet　of　Things　node　domains.　They　have　different　security　policies　and　cooperate　with　each　other　to　realize　complex　functions.　Because　of　the　indirectness　and　uncertainty　of　cross-domain　interaction,　multi-domain　Internet　of　Things　faces　more　security　risks.　Therefore,　we　propose　a　cross-domain　trust　remote　attestation　scheme　in　the　Internet　of　Things.　First,　we　evaluate　the　direct　interactive　trust　of　terminal　nodes,　then　refer　to　the　recommended　trust　of　multiple　domains.　On　this　basis,　a　cross-domain　trust　relationship　construction　mechanism　is　established　to　realize　remote　attestation　of　node　security.　Simulation　experiments　verify　the　effectiveness　of　the　scheme.　And　it　can　better　identify　cross-domain　malicious　interactions.　　©　2023　IEEE.