The purpose of this study is aiming to predict about the morphological changes of the output according to the rheological properties of concrete before hardening from 3D Concrete Printing(3DCP) process and analyze the effect of reinforcement inserted between layers on the behavior of the newly printed layer through computational analysis.To this end, fluid models were constructed using the Bingham and Herschel-Bulkley constitutive laws, and the rheological properties of cement based mortar were determined through orifice extrusion experiments. The suitability for computational analysis was evaluated by comparing the build up stability and morphological behavior of printed outputs between the two models. It was confirmed that the Bingham model exhibited higher stability in the analysis, while the Herschel-Bulkley model showed higher accuracy.The validity of the analysis results was verified by comparing and analyzing the morphological cross-sections predicted through computational analysis with those of the actual 3DCP printed specimens. As a result, when reinforcement was inserted between layers, changes in interlayer bonding behavior and the patterns of void formation around the reinforcement could be numerically confirmed. This study presents the applicability of a computational analysis technique for predicting the morphological stability and bonding characteristics of 3DCP printed structures containing reinforcement.