DK-100 multiple card reader can operate three cards and complete the mutual verification among the three cards simultaneously; And has storage functions of remote or offline data (I. E. Load and unload). It supports a number of contact cards popular in the market (deposit card and CPU card that supports T=0/1 protocols), and is also able to operate multiple cards simultaneously. This equipment can be connected with computer through RS232 serial port or USB interface, with PC keyboard port or PS/2 mouse port supplying the power. It supplies multiple application platforms for system integrators, and supports multiple OS and application software based on PC platform. It is convenient for users to usecard reader in application system as per their requirement, as well as take a second development, so it is suitable to be used in multiple fields.