IC card computer protection device

The utility model discloses a computer access control and personal identification device, which is composed of a microcontroller (U1), a card seat (P1) of an IC card, a non-volatile memory (U2), a real-time clock (U3), a battery (U4), an upstream communication interface (P2), a downstream communication interface (P3), and a power supply wave filtering circuit, wherein, the microcontroller (U1) is respectively connected with the card seat (P1) of the IC card, the non-volatile memory (U2), the real-time clock (U3), luminous diodes (LED1, LED2), the upstream communication interface (P2), and the downstream communication interface (P3); the upstream communication interface (P2) is connected to a PS/2 keyboard interface of a host computer; the downstream communication interface (P3) is connected with a PS/2 keyboard for the computer using the wired PS/2 keyboard; the downstream communication interface (P3) is connected with a lead wire of the PS/2 keyboard interface of a wireless receiver for the host computer using a wireless keyboard. The utility model has the advantages, such as high universality, anti-attack ability, low cost, multiple functions, etc.