In the BT project, the construction contract, which carries the dual responsibility of builders and contractors, is an important element of a contract system . How to maintain the interests of builders and contractors, effectively avoid all kinds of performance risks and reduce the negative impact as low as possible, becomes an important part of risk management contracts. Based on a BT project contract case, we identify and analyze the actual sources of risk response measures of the contracts, so that more contract managers will pay attention to the risk management, accumulate and share successful experience.