Abstract: Internet technology and platform economy have created new models of public service， such as online car-hailing. The effectiveness of platform-based enterprises participating in such public service governance should be noted. Through analysis of the motivation， means and effect of the platform for online car-hailing enterprises participating in online car-hailing governance， the dual effects of effective governance and governance failure are found among platform-based enterprises participating in public service governance. The reasons for the governance failure are further analyzed by using the theory of Actor-System Dynamics. The result shows that the participation of platform-based enterprises in public service governance faces multiple challenges involving the subject， the system and the environment. It is suggested that， by adhering to the concept of cooperative governance， the linkage governance mechanism， incentive mechanism， legal constraint mechanism and big data governance mechanism should be built so as to enhance the effectiveness of platform-based enterprises in their participation in public service governance.

Key words: platform economics, platform-based enterprise, public service governance, online car-hailing