In　this　paper,　several　four-quantum-dot　topological　structures　are　designed.　The　influence　of　the　interdot　coupling　strength　and　intradot　Coulomb　interactions　on　the　conductance　is　discussed.　The　location　of　the　anti-resonance　band　can　be　manipulated　by　tuning　the　interdot　coupling　strength,　which　suggests　a　physical　scheme　of　an　effective　quantum　switch.　The　Fano　anti-resonance　peak　may　evolve　into　a　resonance　peak.　For　the　particular　value　of　the　interdot　coupling　strength,　two　Fano　anti-resonances　collapse　and　bound　states　in　the　continuum　are　formed.　Moreover,　many-body　effect　makes　the　number　of　anti-resonance　bands　increase.　This　study　provides　a　theoretical　basis　for　the　design　of　quantum　computing　devices.