The invention discloses a six-channel aggregation-fusion type squeezing nozzle. The squeezing nozzle is provided with six thread inlets and one thread outlet and is suitable for a fused deposition modeling type (FDM) all-true color three-dimensional printer control system capable of achieving precision printing. Raw material printing threads of each color can be fused without a temperature difference in a nozzle aggregation fusion mixing and stirring cavity in a process of printing a color three-dimensional stereoscopic workpiece, the colored threads are extruded, a thread outlet caliber can be changed, and printing, all true color and high precision can be achieved. Accordingly, the mechanical strength of the printed workpiece reaches the mechanical strength index of the material, maintenance and replacement are convenient, resources are saved, energy consumption is reduced, the cost is reduced, and the nozzle is simple in structure, stable and reliable.