Abstract: 3D printing technology based on direct ink writing(DIW) enables 3D printed materials to get rid of the limitation of material properties， and provides the possibility of additive manufacturing for a variety of materials. In order to ensure the excellent mechanical properties of ceramic materials， the technological parameters of 3D printing extrusion molding of ceramic materials were studied. According to the fluid theory calculations， Fluent was used to numerically simulate the process parameters such as the extrusion speed and the extrusion diameter that affect the small-diameter extrusion process of ceramic materials， and the relationship between the correlation extrusion process parameters and the extrusion amount was obtained. Based on the numerical simulation results， a test including motor extrusion speed， extrusion head caliber， printed moving speed， printed layer height， and laser curing power was given to analyze the different effects of various process parameters on extrusion forming processes.

Key words: ceramics; 3D printing; process parameters; extrusion forming; numerical simulation