The employment of seafloor resources requires the underwater wireless networking technology.Since the underwater wireless sensor networks need new type data-transmitting

separating

locating and distributing technology

a sea-data blind separation method based on unscented Kalman filter（UKF） herein is proposed.This method uses a time-invariant unmixing vector expression as the state equation

and with the use of data sending end modulation expression as observation equation.Experimental results show that the proposed algorithm has good separation performance in constant modulation

binary modulation and M-unit modulation cases.