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Herein,poly(L-lactic acid)(PLLA)nanofibrous spongy microspheres(NFSMS),PLLA/polyethylene glycol(PEG)co-functionalized mesoporous silica nanoparticles(MSN),and poly(lactic acid-co-glycolic acid)microspheres(PLGA MS)are integrated into one multibiologic delivery vehicle for in situ Treg manipulation,where the MSNs and PLGA MS were utilized to distinctly release IL-2/TGF-β and miR-10a to locally recruit T cells and stimulate their differentiation into Tregs,while PLLA NF-SMS serve as an injectable scaffold for the adhesion and proliferation of these Tregs.