 The biodegradable high-strength supermolecular polymer strengthened hydrogel composed of cleavable poly, an acryloyl 2-glycine, PCG, and methacrylate gelatin, GelMA, PCG GelMA, was successfully constructed by photo-initiated polymerization. Introducing hydrogen bond strengthened PACG contributed to a significant increase in the mechanical strengths of Gelatin hydrogel with a high tensile strength, up to 1.1 MPa, outstanding compressive strength, up to 12.4 MPa, large Young's modulus, up to 320 kilopascals, and high compression modulus, up to 837 kilopascals. In turn, the GelMA chemical crosslinking could stabilize the temporary PACG network, showing tunable biodegradability by adjusting ACG slash GelMA ratios. Furthermore, a biohybrid gradient scaffold consisting of top layer of PCG GelMA hydrogel, MN2 plus, and bottom layer of PCG GelMA hydrogel bio. This article was offered by Fei Gao, Ziang Su, Qingfeilang, and others. We are article.tv, links in the description below.