Based on the established eight-volume three-dimensional time field theoretical system, this paper resolves the Higgs mass hierarchy fine-tuning puzzle and the long-standing proton decay mystery from the geometric effect of time field. Microscopic curvature screening of quantum time field naturally cuts off divergent high-energy quantum corrections to Higgs boson, fixing Higgs mass within experimental measured value without artificial parameter fine-tuning. The globally closed topological constraint of three coupled time fields forms a topological conservation law of baryon number, fundamentally forbidding spontaneous proton decay and matching the null-decay results from long-term underground detection experiments. All derivations abide by the unified Lagrangian of 3DT theory and keep consistent with all macroscopic cosmology and microscopic particle physics conclusions of previous papers, finishing the last core theoretical defects of the Standard Model and serving as the final closing paper of the whole serial unified field theory.