the turbo code encoder having register size m 3 to explain the operation of the message tailing circuit those who skilled in the related arts can readily deduct other turbo code encoder having different number of the register size m as long as the marrow of the turbo code block message tailing method of the present invention is grasped when the related data of the block message are sequentially input into these rsc encoders the turbo code encoder encodes and outputs normally after all the related data of the block message had been sequentially input into the rsc encoders the rsc sequentially outputs the data stored in m registers and makes the final state of these m registers back to the 0 state this is major accomplished by setting and fastening the input value of the m 0 register of the rsc encoder to 0 and by making the feedback value of the feedback generator of the rsc encoders that is originally feedback to the input terminal of the rsc encoder divert and send to the x k output channel of the rsc encoder the turbo code encoder subsequently sends out the message tail wherein the message tail has 4 times of m bits they are x 1 x 2 y 1 and y 2 each has m bits the output of the turbo code encoder connects to the x 1 channel of the first rsc encoder in the initial state to sequentially output data x 1 k where k is 1 to n m after n m clocks the output of the.