The invention relates to a control method of yaw startup of a wind generating set. The control method comprises the following steps that firstly, the accelerated speeds of the head of the set are measured, specifically, an accelerated speed sensor is arranged on the head of the set, wherein the sensor at least can measure the accelerated speeds in the two horizontal orthogonal directions; secondly, the swinging direction of the head of the set is judged, specifically, the swinging direction of the head of the set is judged according to the positive-negative characteristic of the accelerated speed of a channel II, and the swinging direction of the head of the set is judged only after the accelerated speed of the sensor channel II has at least two data points in the same direction; and thirdly, whether the swinging direction of the head of the set is consistent with a set yaw control given yaw direction or not is judged, and if the swinging direction is consistent with the yaw direction, a yaw mode is started, otherwise, the first step is repeated. According to the control method, since the swinging direction of the head of the set is judged before yaw operation, and the yaw mode is started only after the swinging direction of the heat of the set is consistent with the set yaw control given yaw direction, accordingly collision between a drive gear of a yaw system and a meshing gear of a yaw bearing is avoided, and yaw is safe and reliable.