In a literal sense, OTG HUB is a device that combines OTG functionality with USB HUB functionality. It has two features: OTG and HUB. OTG [1] is mainly used in a variety of different equipment or mobile devices between the connection, data exchange, especially PD, mobile phones, consumer equipment. USB HUB is a device that can extend a USB interface to multiple and enable these interfaces to be used at the same time. OTG HUB through the application of new technology, so that USB HUB with HUB function, but also for the OTG function of the mobile phone, using OTG function, read USB flash drive, mobile hard disk and other data.