Abstract: The motion estimation research based on the H.264/AVC standard，which is a research hotspot in video compression field.A fast motion estimation algorithm based on adaptive threshold static block detection is proposed in this paper.It uses the statistics of graph sequence to early terminate the search，proposes a synthetic diamond-rood-cross search pattern，using different strategy according to the video sequence.Compared to the conventional fast search algorithm，experiments show that with the same image quality assurance，the speed is 10 times up.