本文首先介绍了已有的调制识别方法：判决理论识别方法和统计模式识别方法[9]，然后详细介绍了基于小波变换调制识别过程，最后分析了数字信号调制识别技术的发展前景。-This paper first introduced the existing modulation identification method: Decision theory identification method and statistics pattern recognition method, Then detailed introduction modulation identification process based on wavelet transform, At last, analyze the digital signal modulation recognition technology development prospects.