The operation of PPP mode has three important features: partnership, sharing benefits and risks. The practices of promoting PPP model in British and Canada brought us important implications. For the promotion and application of PPP mode, we should accelerate the construction of PPP legal system; cultivate the spirit of contract and actively promote the construction of legal contract system; innovate financial support modes and support the promotion of PPP mechanism with efforts from all around; establish standardized and systematic supervision and management mechanism to prevent financial risks.