A method and server for managing shared vehicles, the method comprising: receiving shared information and usage smart contract sent by a vehicle owner client; registering which in a block chain network and performing an entire network radio; receiving a rental request-sent by a rental client and registering the rental request into the block chain network; calculating a user grade of the user initiating the rental request according to a credit smart contract, searching matched shared vehicles; sending the matched shared vehicle to the rental client and the rental client determines a target shared vehicle; releasing usage authorization of the target shared vehicle to the rental client, so the vehicle owner obtains the real information of the user in time and knows the rental and service conditions of the shared vehicles in each time period, so that the vehicle owner shares their own vehicles to every service platforms relievedly.