根据小波变换的多尺度分解特性,构造了一种小波能量积累器,将不同分解尺度上的能量进行积累。在此基础上设计了一种用于弱信号检测的小波能量检测法,并对低信噪比信号的检测进行了仿真实验。仿真结果表明,该检测法对低信噪比信号是比较有效的,而且与传统的脉内累加平均的信号检测方法相比,文中提出的信号检测方法具有一定的优越性 According to the multi-scale decomposition characteristics of wavelet transform, a wavelet energy accumulator is constructed to accumulate the energy at different decomposition scales. On this basis, we design a wavelet energy detection method for weak signal detection, and simulate the detection of low signal to noise ratio signal. Simulation results show that the proposed method is effective for low signal-to-noise ratio signals, and compared with the traditional method of accumulating and averaging intra-pulse signals, the signal detection method proposed in this paper has some advantages