The invention discloses a contacting type smart card emluator which comprises a power supply module, an emulation chip, a clock choosing switch, a detecting control module and an inside clock module and an upward pulling resistance which is connected on the outside diaplasis single pin RST in the 7816 connector of the emulation chip. The power supply module supplies power supply to all apparatusesin the emluator. A clock choosing switch has two paths of clock single inputs for one patch can be directly connected with the clock output of a card reader while the other path comes from the clocksingle output of the inside clock module in the emluator; the clock choosing switch is controlled by the detecting control module, chooses one path of the two paths clock single inputs and outputs tothe emulation chip. The detecting control module detects whether having power supply coming from the card reader, so as to control the clock to choose switch. The invention can ensure the users to truly simulate the communication foundation procedures of the cards and card readers when the emluator is connected with the card reader and lead the emluator to solely work and be sued for debugging theother functional parts besides the communication part in the user procedures when the emluator is not connected with the card reader.