A method for transmitting multiple streams of Time Division traffic, characterized in that it comprises: calculating a channel traffic sequence number corresponding to a stream of Time Division traffic (101, 201); determining, according to the calculated channel traffic sequence number, a Channel Number, CN, of a channel bearing traffic data; successively writing the traffic data borne on the channel bearing the traffic data and the CN of the channel bearing the traffic data respectively into a traffic data First Input First output queue, FIFO, and a traffic Channel Index, (CI, FIFO; when traffic needs to be read, reading traffic data of the Time Division traffic and a CN of a channel bearing the traffic data of the Time Division traffic respectively from the traffic data FIFO and the traffic CI FIFO (104, 205) wherein the calculating a channel traffic sequence number corresponding to a stream of Time Division traffic comprises: obtaining the channel traffic sequence number corresponding to the stream of Time Division traffic by obtaining a sum over a bit corresponding to the stream of Time Division traffic and any preceding bit in a bitmap of the Time Division traffic, and then ANDing the sum with the bit corresponding to the stream of Time Division traffic, wherein the bitmap represents a frame structure of the Time Division traffic, and indicates a number of streams of Time Division traffic data transmitted on a time slot when transmitting the multiple streams of the Time Division traffic, a bit width of the bitmap representing a maximal number of transmitted streams of Time Division traffic data supported by a system, wherein the determining, according to the calculated channel traffic sequence number, a CN of a channel bearing traffic data comprises: filtering out, from calculated channel traffic sequence numbers corresponding respectively to streams of Time Division traffic, any channel traffic sequence number equal to zero; determining a channel corresponding to a nonzero channel traffic sequence number to be a channel bearing traffic data; and determining the CN of the channel bearing the traffic data. calculating a channel traffic sequence number corresponding to a stream of Time Division traffic (101, 201); determining, according to the calculated channel traffic sequence number, a Channel Number, CN, of a channel bearing traffic data; successively writing the traffic data borne on the channel bearing the traffic data and the CN of the channel bearing the traffic data respectively into a traffic data First Input First output queue, FIFO, and a traffic Channel Index, (CI, FIFO; when traffic needs to be read, reading traffic data of the Time Division traffic and a CN of a channel bearing the traffic data of the Time Division traffic respectively from the traffic data FIFO and the traffic CI FIFO (104, 205) wherein the calculating a channel traffic sequence number corresponding to a stream of Time Division traffic comprises: obtaining the channel traffic sequence number corresponding to the stream of Time Division traffic by obtaining a sum over a bit corresponding to the stream of Time Division traffic and any preceding bit in a bitmap of the Time Division traffic, and then ANDing the sum with the bit corresponding to the stream of Time Division traffic, wherein the bitmap represents a frame structure of the Time Division traffic, and indicates a number of streams of Time Division traffic data transmitted on a time slot when transmitting the multiple streams of the Time Division traffic, a bit width of the bitmap representing a maximal number of transmitted streams of Time Division traffic data supported by a system, obtaining the channel traffic sequence number corresponding to the stream of Time Division traffic by obtaining a sum over a bit corresponding to the stream of Time Division traffic and any preceding bit in a bitmap of the Time Division traffic, and then ANDing the sum with the bit corresponding to the stream of Time Division traffic, wherein the determining, according to the calculated channel traffic sequence number, a CN of a channel bearing traffic data comprises: filtering out, from calculated channel traffic sequence numbers corresponding respectively to streams of Time Division traffic, any channel traffic sequence number equal to zero; determining a channel corresponding to a nonzero channel traffic sequence number to be a channel bearing traffic data; and determining the CN of the channel bearing the traffic data. filtering out, from calculated channel traffic sequence numbers corresponding respectively to streams of Time Division traffic, any channel traffic sequence number equal to zero; determining a channel corresponding to a nonzero channel traffic sequence number to be a channel bearing traffic data; and determining the CN of the channel bearing the traffic data.