The invention relates to the field of burners, and discloses an internal circulation low-nitrogen gas burner. A swirler is sleeved on one end of a first gas pipe, and an annular gas head is sleeved on the outside of the swirler and has a gap with the swirler. Coordinated, the second gas pipe delivers gas to the annular gas head, the shunt pipe is sleeved on the outside of the annular gas head, and the flow partition is sleeved on the outside of the shunt pipe, and forms a flue gas channel with the shunt pipe. Multiple sets of inner ring gas components are located in the flue gas passage, and multiple sets of outer ring gas components are installed around the flow partition. The shunt pipe is used to divert the air to form the air for mixing smoke and the air for mixing combustion. When the air for mixing smoke flows through the flue gas channel, a negative pressure is generated at the smoke inlet, so that the smoke in the combustion chamber is sucked in and participates in combustion again. Due to the way of using the vacuum to directly recover the flue gas, not only the flue gas channel is omitted, the hidden danger of safety is eliminated, but also the use cost is reduced.