The invention relates to a modular multifunctional mobile phone cabin. The modular multifunctional mobile phone cabin is multi-functional and modularly reduced in size. The modular multifunctional mobile phone cabin is composed of a charger plug, a zoom lens accommodating groove, a zoom lens, a charging cable accommodating box, a mobile phone stand, an earphone accommodating box, a rotary joint, aplug-in device, a closing device, a USB jack, an earphone jack, a charging port and the like. All necessary items that are not easy to carry can be arranged together; the plug-in type charger plug and the charging cable accommodating box can be used for charging; and a mobile phone can be charged when the mobile phone has no power, so that troubles brought by the large size and inconvenience in carrying of a power bank can be saved. The zoom lens can expand the focal length of the camera lens of the mobile phone, so that photographing can be facilitated. The zoom lens accommodating groove canaccommodate the zoom lens. The mobile phone stand can free the hands of a user who watches a movie. The earphone accommodating box can accommodate an earphone, so that a condition the user loses theearphone during travel can be avoided. The earphone jack and the charging port can facilitate the plug-in connection of the earphone and charging.