Abstract: Based on Blakley secret key sharing scheme，this paper presents an audio watermarking sharing algorithm.In this algorithm，the key sharing method is introduced into audio watermarking algorithm by separating the watermark in different segments of the audio data，so when detected，the original watermark can be gotten back by extracting only part of the watermark information.At the same time，this algorithm uses Bark code to solve the synchronization problem brought by cropping attack，and uses approximation signal statistical characteristics of approximation signal and error correcting code method to improve the algorithm’s robustness.The experiments prove this algorithm has a nice ability to resist cropping attack.