The invention discloses a multi-spray-head interference-free printing method of a 3D printer, which is characterized in that each spray head is provided with a tilting device, the spray heads, which are not in operation, are tilted in printing, a
spray nozzle of each spray head, which is not in operation, is enabled to break away from an operating plane, and only the spray nozzles of the spray heads, which are in operation, are located at the operating height. In the technical scheme disclosed by the invention, each spray head can be tilted independently and does not affect other spray heads, a spray head material conveying
pipe is a flexible
pipe, small-angle tilt of the spray head basically has no influence on the material conveying
pipe, the spray heads are slightly modified, the structure is simple, and the cost is reduced. Meanwhile, an upper endpoint of each spray head is fixed in position, the
spray nozzle moves in a circular arc mode, and tilt and
recovery of the spray head have no influence on the precision.