The invention provides an expanding device for an intelligent
mobile phone. The expanding device comprises a shell and a main circuit board arranged inside the shell, wherein the shell consists of a shell body, a cover body pivoted with the shell body, a display screen arranged on the cover body, a keyboard arranged on the shell body, a
touch panel arranged on the shell body, a
loudspeaker module arranged in the shell body and a port module arranged on the side surface of the shell body; and the main circuit board consists of a video / audio conversion unit, a power supply module, an
audio power amplifier module and an interface module, a charging control module and the interface module, and a
Bluetooth module, wherein the power supply module, the
audio power amplifier module and the interface module are electrically connected with the video / audio conversion unit respectively, the charging control module is electrically connected with the power supply module, and the
Bluetooth module is electrically connected with the power supply module. In the invention, video signals and audio signals of the intelligent
mobile phone can be connected into the device by a simple cable, thus realizing a large-screen display effect and a high-quality
acoustic effect; a
Bluetooth keyboard and a
touch panel are utilized to conveniently carry out
text entry and screen operation on the
mobile phone, and
text entry speed is rapid; and strong power support is provided for the mobile phone.