A modular electronic cigarette which can be assembled into different shapes and configurations includes at least one atomization module and at least one battery module, the at least one atomization module and at least one battery module being detachably assembled together by means of magnetic connection, snap-fit, USB connection, or accessory to obtain various combination shapes of the electronic cigarette. Threaded connections between components are not required. The electronic cigarette can satisfy requirements of the user for simple and diverse combinations of components, thus increasing the user experience.