Topological　edge　states,　emerging　at　boundaries　between　regions　with　distinct　topological　properties,　enable　unidirectional　transmission　with　robustness　against　defects　and　disorder.　However,　achieving　dual-band　operation　with　high　performance　remains　challenging.　Here,　we　integrate　dual-band　topological　edge　states　into　a　valley　photonic　crystal　cavity　operating　in　the　mid-infrared　region,　leveraging　triangular　scatterers.　A　key　contribution　of　this　work　is　the　simultaneous　realization　of　ultra-high　Q-factors　(up　to　6.1593　x　10(9))　and　uniform　mode　distribution　(inverse　participation　ratio　＜　2)　across　both　bands.　Moreover,　the　dual-band　cavity　exhibits　exceptional　defect　tolerance.　These　findings　provide　a　promising　platform　for　mid-infrared　photonic　integration,　paving　the　way　for　high-performance　optical　cavities　in　multifunctional　photonic　systems.