This paper  studies the watermarking technology by the realization difficulty and the value in the audio information.After analyzing and contrasting with the algorithm of hiding information in the audio.We discuss the hidden correspondence code strategy,propose an information hiding encoding algorithm based on the mix pattern audio signal.In this paper we give the code process to cover the radius, the cover code and the related definitions and the information hiding code correlation theorems at first,and theoretically analyze the hiding correspondence code strategy’s feasibility and the steps.Besides,we demonstrate the principle and method of this encoding algorithm in detail. Finally,we take a section of audio information as the example,elaborate the hidden correspondence algorithm to realize the method and the coding steps.Finally,from the algorithm’s spectral analysis,the hiding information inserting quantity and the sense of audio effect,we test the algorithm’s performance,which indicates that the algorithms hidden information embeding quantity may reach 2.1×103bps.