Aiming at the inter-symbol interference (ISI) and channel uncertainty in satellite-to-ground high-speed remote sensing transmission channel, a dual-mode adaptive blind equalization method is proposed, combine the advantages of high robustness of CMA equalizer and high precision of LMS equalizer. At the beginning of equalization, CMA equalizer is used to realize fast convergence, and when MSE is small, LMS equalizer is used to achieve high precision convergence.