The invention relates to a frame capture synchronization method and device, and the method comprises the steps: obtaining a received
signal and a first power value thereof, calculating a cross-correlation value between the received
signal and a local short training domain sequence, and obtaining a frame boundary position according to the cross-correlation value and the first power value, the short training domain sequence of the received
signal comprising a scrambling code layer; calculating a
time domain self-correlation value and a second power value of the received signal from the frame boundary position;
peak value judgment is carried out in a second preset search window according to the
time domain self-correlation value and the second power value,
peak value search is carried out on the received signals meeting the
peak value judgment condition in the second preset search window, the maximum judgment value in peak value judgment is found out, and the judgment value is the ratio of the
time domain self-correlation value to the second power value; the position corresponding to the maximum value is a synchronization point position, so that synchronization success is judged. According to the invention, the problem of poor synchronization performance of a synchronization method in the prior art under the conditions of large
noise interference and low signal-to-
noise ratio can be solved.