Smart card multi-protocol adaptive method and smart card

The embodiment of the invention discloses a smart card multi-protocol adaptive method and a smart card. A bit zone is stored in a memory of the smart card, and is used for storing characteristic values, so that the communication protocol types supported by the current smart card can be determined, wherein the characteristic values correspond to the communication protocol types supported by the smart card. The method comprises the following steps of: receiving a communication request of a terminal, wherein the communication protocol type supported by the terminal is a first communication protocol; modifying the bit zone to be a second characteristic value after the bit zone is read to be the first characteristic value; and re-reading the bit zone after the communication protocol type corresponding to the first characteristic value is determined to be not the first communication protocol. The method is suitable for adaption of the smart card among multiple protocols.