Step type continuous extruding device using metal powder as raw materials

The invention provides a step type continuous extruding device using metal powder as raw materials. The step type continuous extruding device comprises an extruding wheel, a die cavity and a hopper; annular grooves in the circumferential surface of the extruding wheel and the cambered surface and stop blocks of the die cavity are assembled to form multiple parallel arc-shaped channels; the channels communicate with one another through gaps between the extruding wheel and the cambered surface of the die cavity; the channels are unequal in length; only one of the channels has the radial outlet;the metal powder is added through the channel which is located at the end farthest from the radial outlet and has no radial outlet, is extruded and rubbed in the channels between the annular grooves of the extruding wheel and the cambered surface of the die cavity, is subjected to metallurgical bonding under the high-temperature and high-pressure actions produced by the friction force, is forced to be extruded out of the