Robustness is the key problem in digital watermarking.A robust watermarking method based on JADE algorithm is proposed.In the algorithm

watermark is embedded by iterative blending

which guarantees that the watermark has better invisibility and robustness

then regards mixed image as one observed signal

watermark information as the other observed signal.Finally

blind source separation JADE algorithm is adopted to detect the watermark without precise location.The theoretical analysis and simulation results show that it has stronger robustness.