Abstract: The communication protocol of data link layer is studied based on quantum teleportation.When two sites communicate in data link layer，quantum frame is sent via quantum channel.When receiving quantum frame within the set time,the receiver returns to confirm frame via the quantum channel.According to the transient of quantum teleportation,the transmission delay of two sites communication is reduced;as a result,the minimum time span between two successfully delivered quantum frames can be reduced,the communication time is shortened and communication efficiency is improved.And since the sender on the transmission of quantum information is unknown，the confidentiality of information transmission is also increased.

Key words: quantum communication, teleportation, data link layer, stop-wait protocol