The invention relates to a driving plate transmission mechanism of a braiding machine. The driving plate transmission mechanism comprises driving plate shafts, synchronous toothed pulleys, synchronous toothed belts, reversing gears, rolling bearings, bearing pedestals, spindle driving plates, spacing sleeves, and keyless liners. The driving plate transmission mechanism includes bilayer and single layer types. For the bilayer type, long driving plate shafts and short driving plate shafts are adjacently arranged on an upper plate of the braiding machine, and one of the long driving plate shafts serves as a power input shaft, which realizes reverse rotation with a neighbouring short driving plate shaft through the reversing gears and forms linkage through the synchronous toothed belts and synchronous toothed pulleys. For the single layer type, pulleys on all driving plate shafts are in one working plane, and synchronous toothed pulleys on all short driving plate shafts are installed by a two-sided synchronous toothed belt rolling in an 8-shaped mode, so that two neighbouring pulleys can be in inverted synchronous rotation. By substituting gear meshing transmission with synchronous toothed belt transmission, the transmission mechanism of the invention has stable transmission and lower noise, eliminates oil pollution, lightens the weight of a complete machine, and lowers manufacturing accuracy requirements. Therefore, the transmission mechanism provided in the invention can substantially increase the operation speed of the braiding machine and is convenient for installation, thus improving economic benefits.