The invention relates to an asphalt heating furnace, and belongs to the technical field of metallurgical coking equipment.The asphalt heating furnace comprises a radiation section (1) and a chimney (5).An air pre-heater (2) is arranged between the radiation section (1) and the chimney (5).The radiation section (1) comprises a furnace bottom (1.1), a middle shell (1.2) and a furnace top (1.3), and a burner (9) is arranged in the center of the furnace bottom (1.1).A coiled spiral heating tube (7) is arranged in the radiation section (1).A radiation extension section (17) is arranged between the radiation section (1) and the air pre-heater (2).A flow guide cover (18) is arranged in the radiation extension section (17).According to the asphalt heating furnace, the phenomenon that asphalt in a tube cokes can be effectively prevented, and it is found in actual use that no coking phenomenon happens after the heating furnace continuously operates for 12 months, which shows a large extent of improvement compared with the original use practice that a heating furnace needs decoking treatment after being used for 3 months.