The invention discloses manufacturing equipment of a rainbow tube, which is primarily characterized in that: a die head comprises an aligning shaft (12), a die core (15), a die barrel (16), inner core positioning dies (17) and dies (18), wherein, the die core is sheathed on the aligning shaft and sheathed into the die barrel, the inner core positioning dies are installed on the die core detachably, the dies are installed on the core barrel detachably, the die barrel is connected and communicated with a feed barrel of an extruder through a discharge port, two diffluent channels (19 and 21) are arranged on the die core, an included angle is formed by the two diffluent channels, the entry ends of the two diffluent channels are connected and communicated with the feed barrel through a through hole and the discharge port on the die barrel, and the exit ends of the two diffluent channels are connected and communicated with the channels of the dies. The inner core and outer sheath of the rainbow tube can be completed together on a set of equipment only by changing the inner core positioning dies and dies with different calibers as the detachable inner core positioning dies and dies are adopted, furthermore, plastics are not easy to stack in the die head, thus being characterized by quick discharge and high production efficiency.