银行U盾不识别怎么办

你的Windows的设备配置如何，Win 7的USB驱动程序是否安装？

参考VB的官方说明（http://download.virtualbox.org/virtualbox/5.1.26/UserManual.pdf）：

USB.

VirtualBox emulates three USB host controllers: xHCI, EHCI, and OHCI. While xHCI handles all USB transfer speeds, only guest operating systems released approximately after 2011 support xHCI. Note that for Windows 7 guests, 3rd party drivers must be installed for xHCI support.

Older operating systems typically support OHCI and EHCI. The two controllers are needed because OHCI only handles USB low- and full-speed devices (both USB 1.x and 2.0), while EHCI only handles high-speed devices (USB 2.0 only).

The emulated USB controllers do not communicate directly with devices on the host but rather with a virtual USB layer which abstracts the USB protocol and allows the use of remote USB devices.

再看3.10一节相关USB的详细配置说明, 以及“12.8.7 USB not working”一节。