Method for manufacturing male die of large megawatt fan blade

The invention discloses a method for manufacturing a male die of a large megawatt fan blade. The method is characterized by comprising the following steps of: dividing the male die into a blade root male die and a blade tip male die from the middle part; respectively manufacturing and forming the blade root male die and the blade tip male die; and then, carrying out abutting joint of the blade root male die and the blade tip male die, thereby forming an integral male die. The blade root male die is manufactured manually; and the blade tip male die is firstly manufactured manually and then processed by using a numerical control machine tool. According to the method disclosed by the invention, the male die of the large megawatt fan blade can achieve the requirement of the blade profile precision; and simultaneously, the production efficiency is effectively increased, and the processing cost is lowered.