The invention provides a modular assembly and a mobile terminal, wherein the modular assembly comprises a first electronic device, a second electronic device and a flexible circuit board. The circuit substrate of the first electronic device and the circuit substrate of the second electronic device are arranged in a corresponding manner and are electrically connected. The circuit substrate of the first electronic device is electrically connected with the flexible circuit board. The circuit substrate of the second electronic device is electrically connected with the flexible circuit board through the circuit substrate of the first electronic device. According to the modular assembly and the mobile terminal, through using at least two electronic devices and one flexible circuit board as one modular assembly in which the flexible circuit board is shared, occupation space of the electronic devices can be reduced.