USB composite equipment and working method thereof

The invention belongs to the field of electronic circuit design and provides USB composite equipment and a working method thereof. According to the USB composite equipment and the working method thereof, at least a storage function and a video function are integrated, camera photo or video content can be recorded in a TF/SD card, the camera photo or video content can also be synchronized to a host after the USB composite equipment is connected to the host, and read-write operation on the content in the TF/SD card by the host is further realized. Compared with the prior art, direct operation on the content in the TF/SD card can be realized without the need for connecting the TF/SD card to the host, so that convenience is brought to a user, economical efficiency and environmental friendliness are achieved, and the USB composite equipment and the working method thereof are especially suitable for being applied to a mini DV, an automobile data recorder, aerial photographing equipment, etc. 本发明属于电子电路设计领域，提供了种USB复合