The invention relates to the electric light source illumination technology field, particularly to a direct-current low-voltage power supply injection locking power synthesis dual halogen lamp. The halogen lamp comprises two halogen lamp tubes, a direct-current low-voltage power supply, a reference crystal oscillator, an oscillation driving chip, a push-pull amplifier, a push-pull oscillator, and an addition coupler. The output of the oscillation driving chip is connected with the push-pull amplifier; power synthesis of a push-pull amplifier transformer T1 and a push-pull oscillator transformer T3 is carried out by the addition coupler; and the two halogen lamp tubes are matched to realize ignition. A signal of the reference crystal oscillator is injected into an RC oscillator of the oscillation driving chip by a frequency divider to lock a phase; and the push-pull amplifier transformer T1 and the push-pull oscillator transformer T3 carry out coherent and synchronous phase locking under power synthesis cross-coupling injection locking frequency pulling so as to obtain high-power irradiation, thereby avoiding high temperature rising of the device, oscillation frequency changing, power unbalancing, and lamplight reduction. According to the invention, the halogen lamp is suitable for commercial decoration irradiation occasions needing halogen lamps with direct currents, low voltages and heavy-current power supplying.