A method for carrying out scrambling-parallel treatment on bit includes expanding value of scrambling code to be negative infinite, moving phase value of bit scrambling code sequence in bit phase value storage towards positive infinite for N sub-traction M numbers of phases and storing them, using M as non-effective bit digit at low bit in the first parallel data sequence and N as bit digit of parallel data sequence, inputting parallel data sequence and using moved bit scrambling code sequence and said parallel data sequence to finalize scrambling-operation.