To reduce the effect of suppliers' supply uncertainties, collaborative replenishment models are studied under the circumstances that two suppliers-one manufacturer system under VMI arrangement with random yield. Under VMI arrangement, the manufacturer chooses contract, and suppliers make decisions of production quantities. Two different contracts are proposed, which are basic profit sharing contract, and profit sharing contract with supply subsidy and the additional penalty on critical supplier, and the Nash equilibrium are analyzed under the two contracts. Results shows that basic profit sharing contract cann't coordinate the decentralized supply chain with random yield. Profit sharing contract with supply subsidy and additional penalty on critical supplier not only can coordinate the decentralized supply chain with random yield, but also can realize arbitrarily division of supply chain profit between suppliers and the manufacturer.