By using hyper-crosslinked polymer with triphenylphosphine skeleton (HCP-PPh3) as a matrix, we successfully synthesized an efficient HCP-PPh3-Ru(III) precursor for hydrogen evolution reaction (HER) and ammonia borane (AB) hydrolysis. The generated HCP-PPh3-Ru with a Ru loading of 5.0 wt% displays a high electrochemical performance for HER with an overpotential of 61 mV at a current density of 10 mA cm(-2). Moreover, HCP-PPh3-Ru with a Ru loading of 3.5 wt% exhibits the best catalytic activity for AB hydrolysis with a turnover frequency of 402 mol H-2 (mol(RU) min)(-1). The high catalytic property of the achieved catalyst is probably attributed to the substantial porosity and individual pore structure of support Furthermore, the P-functional groups in HCP-PPh3 can facilitate the anchoring of Ru functioning as coordination sites to stabilize the small Ru nanoparticles, thereby deduces the high catalytic activity. The present work provides a facile strategy for synthesizing efficient microporous organic polymer stabilized Ru catalyst for HER and aqueous AB decomposition.