一种USB静电防护电路，包括一第一二极管数组及一连接所述第一二极管数组两端之稳压二极管，所述稳压二极管之正极接地，所述二极管数组用于连接一第一数据信号端及一第二数据信号端，所述第一数据信号端和第二数据信号端之静电经过所述第一二极管数组被所述稳压二极管导入地表，所述USB静电防护电路还包括有电压保护电路，所述稳压二极管之负极连接所述电压保护电路之一端，所述电压保护电路之另一端用于连接一USB界面之电源端，当所述电源端为低电平，且所述第一数据信号端或第二数据信号端为高电平时，所述电压保护电路断开所述第一二极管数组与所述电源端之间之连接，防止所述电源端从低电平被改变为高电平。

A USB ESD protection circuit includes a first diode array, a zener diode coupled to two terminals of the first diode array, and a voltage protection circuit. The positive pole of the zener diode is grounded. The negative pole of the zener diode is configured to couple to a first data port and a second data port of a USB connector. Static in the first data port and the second data port is guide to the ground by the zener diode via the diode array. A first terminal of the voltage protection circuit is coupled to the negative pole of the zener diode. A second terminal of the voltage protection circuit is configured to couple to a power port of the USB connector. When the power port has a low level voltage and the first data port or the second data port has a high level voltage, the voltage protection circuit switches off the connection between the first diode array and the power port, preventing the low level voltage of the power port from being changed to the high level voltage.