The invention provide a power battery and an electric vehicle. The power battery comprises at least two battery modules, each of which has a socket structure on a positive terminal and a negative terminal; and an electrical connection structure, comprising an electrical connector and plugs respectively arranged at both ends of the electrical connector, wherein one plug is inserted into the socketstructure on the positive terminal of one battery module, and the other plug is inserted into the socket structure on the negative terminal of the other battery module. In the embodiment of the invention, the battery module and the electrical connection structure are connected by using a plug-in manner, and the time required for performing the plug-in operation is shorter, the operation is more convenient, and the work efficiency of battery module connection assembly can be effectively improved compared with than the bolt connection manner in prior art.