Abstract: The present application discloses an injection system for a die casting machine, which includes an accumulator, an injection cylinder, a pressurization cylinder and a valve module connected via an oil pipeline; in a slow injection phase of the injection cylinder, the valve module is adapted for dynamic switching between a phase of an oil pump of the oil pipeline supplying oil alone and a phase of the oil pump and the accumulator jointly supplying oil; in a fast injection phase, a braking phase, a tracking phase and a pressurization injection phase, the oil pump of the oil pipeline and an oil tank form a first A-type half-bridge structure.