In the channel coding of the terahertz communication system, the CPU multi-core is employed to perform parallel computing to achieve acceleration of the compiling code program for Turbo code. The optimized acceleration of Turbo code including four aspects, namely reserved memory space, parallel cycle, the optimization of coding structure and the decoding formula, thereby realizing shortening of code runtime. After experimental verification, the calculation of the compiling code is performed on different code length data. It is found that the parallel calculation can be shortened by 56.6%when the input code length is 10 000 bit.