Ruthenium (Ru)-based catalysts are active in catalyzing polyethylene (PE) upcycling, but their tendency for methanation devalues the process. Although previous works confirmed that the regulation of the Ru structure can inhibit methane yields, the mechanism is still unclear, and the catalytic performance remains higher upside potential. Herein, we synthesized M-Ru/H-ZSM-5 (M = Pt, Pd, Rh) catalysts for PE upcycling. Pt-Ru/H-ZSM-5 had better conversion (84.36%) and liquid fuel selectivity (78.38%) and extremely low methane selectivity (8.43%), which can be ascribed to its more electron-deficient Ru