Although the collagen/gelatin/alginate material system had been proven to offer many advantages in this paper, such as bioprinting with high resolution, higher cell viability at 94.6 ± 2.5% and good mechanical properties (self-supporting for layer-by-layer fabrication), its limited ability to tune degradation properties, which is not beneficial to cell proliferation and differentiation, remains a significant inhibitor to the application of this collagen/gelatin/alginate material system. Recently, some new material systems have been investigated to replace the alginate system. Pati, Cho, et al. reported the use of a decellularised extracellular matrix (dECM) to bioprint cell-laden constructs with an optimised microenvironment conducive to the growth of 3D structured tissue. Although dECM bioink has suitable chemical composition to support cell growth and maintenance, poor mechanical properties that are not self-supporting for layer-by-layer fabrication and the lack of tailored microgeometry make them require another polymeric framework (like PCL framework) for mechanical support. These polymeric frameworks are usually hard to dissolve or remove. Das printed a 3D construct with silk fibroin-gelatin bioink and used enzymatic or physical cross-linking to cross-link it. However, with either enzymatic cross-linking by mushroom tyrosinase or physical cross-linking via sonication, the procedure was harmful to the cells embedded in the gel. Moreover, the cross-linked construct still showed a slow degradation rate and could not tune degradation properties. For our study, we tried to solve the problem with the lack of degradation of the alginate gel system by adding sodium citrate and controlling the degradation time of the printed constructs by altering the amount of sodium citrate that was added. Interestingly, the results not only proved that it is practical for accelerating and changing the degradation time of constructs by altering the mole ratio of C/A in the system but also indicated that, with the degrading effect of sodium citrate, the printed cells in the 3D hydrogels grew faster, had a much better capacity to proliferate and expressed greater specific marker proteins.