The invention provides a driving device for a wind turbine high-speed shaft. The driving device comprises a connecting board, a reducer, a motor, an input shaft, an output shaft, a large hand wheel, a small hand wheel, a removable key, a sliding small gear, a large gear and a trip switch. The motor can drive the high-speed shaft through the reducer, the small gear and the large gear. The invention further provides a driving method for the high-speed shaft, the circumferential direction of the high speed direction can be finely adjusted by rotating the small hand wheel. Furthermore, when electricity is out, the key in the output shaft can be removed, and the large hand wheel can be rotated to rotate the high-speed shaft. The driving device is simple and efficient, flexible to operate, and time saving and labor saving, and automatic locking of a wind wheel can be realized.