Dirac　degeneracy　is　a　fourfold　band　crossing　point　in　a　three-dimensional　momentum　space,　which　possesses　Fermi-arc-like　surface　states,　and　has　extensive　application　prospects.　In　this　work,　we　systematically　study　the　exceptional　effects　of　the　robust　chiral　surface　wave　supported　by　photonic　Dirac　semimetal　acts　on　the　dielectric　particles.　Theoretical　results　show　that　orthogonal　electromagnetic　modes　and　helical　or　chiral　whispering　gallery　modes　(WGMs)　of　dielectric　particles　can　be　efficiently　excited　by　the　unidirectional　spin-polarized　surface　wave.　More　importantly,　optical　forces　exerted　by　the　spin-polarized　surface　wave　exhibit　chirality-dependent　symmetric　behavior　and　high　chiral　Q　factor　with　precise　size　selectivity.　Our　findings　may　provide　potential　applications　in　the　area　of　chiral　microcavity,　spin　optical　devices,　and　optical　manipulations.　©　2024　Optica　Publishing　Group.　All　rights,　including　for　text　and　data　mining　(TDM),　Artificial　Intelligence　(AI)　training,　and　similar　technologies,　are　reserved.