Abstract: A foldable musical-instrument stand comprises a fixing structure and a supporting structure. The supporting structure comprises a main supporting piece hinged with the fixing structure, first and second side supporting pieces, L-shaped first and second side connecting pieces, first and second brackets; two ends of the first and second side connecting pieces are respectively hinged with the main supporting piece and the first or second side supporting piece; long-edge terminals of the L-shaped first and second brackets are respectively hinged with the main supporting piece or hinged to the first and second side supporting pieces; first and second limiting pieces, respectively hinged with the first or second side supporting piece, are arranged on the first and second side supporting pieces; the main supporting piece, side supporting pieces, side connecting pieces, brackets and limiting pieces each have an opening position and a folding position. A multi-headed musical-instrument stand is also provided.