Two-range radiant section furnace tube used for ethylene cracking furnace

The utility model provides a two-range radiant section furnace tube used for an ethylene cracking furnace. The two-range radiant section furnace tube comprises at least one group of M-N type furnace tubes consisting of first-range furnace tubes and second-range furnace tubes, M is the amount of the first-range furnace tubes, N is the amount of the second-range furnace tubes, and N is greater than or equal to 2; the first-range furnace tubes and the second-range furnace tubes are connected through a multi-channel pipe fitting; a Venturi flow distributor is arranged at the inlet end of each second-range furnace tube. Compared with the prior art, the two-range radiant section furnace tube has the advantages that the phenomenon of uneven flow distribution can be effectively improved, and the structural arrangement mode of radiant furnace tubes is widened.