Portable identity authentication device and identity authentication method

The invention discloses a portable identity authentication device and an identity authentication method. The portable identity authentication device comprises a control device, a display screen, a human body information collection device, an identity information collection device, a communication device, a human body induction device and an alarm device, wherein the control device is connected with the display screen, the human body information collection device, the identity information collection device, the communication device, the human body induction device and the alarm device separately; the communication device is provided with a communication interface; the communication device is connected with an external authentication host through the communication interface. By the adoptionof the portable identity authentication device, the convenience for implementing identity authentication measures can be improved. The portable identity authentication device can be used for passengerflow analysis, the passen