TSAE-Z algorithm combines time slice autocorrelation envelope detection with step-variable Zoom-FFT detection (TSAE-Z), and achieves rapid and precise detection of cyclic-stationary signals. Results of simulation shows that, on condition of the same length of data, TSAE-Z algorithm is able to significantly decrease implementing time of detection by thousand-grade, and on condition of the same implementing time, TSAE-Z algorithm can get 6dB improvement at least on detection performance as well as on detection resolution.