A method of manufacturing a composite golf club head with a metal face includes the following steps. 1. Arrange two die and a mold plunger. 2. Combine the dies to form a mold cavity, which bottom is installed with a metal bottom board. 3. Put a bulk molding compound (B.M.C.) into the mold cavity. 4. Move the mold plunger into the mold cavity to compress the B.M.C. 5. Solidify the compressed bulk molding compound, and then separate the dies and the mold plunger to get a composite main body of the golf club head. The main body thus obtained has a main casing with a top opening. 6. Mount a composite top casing to the main casing to cover the top opening. Mount a metal front casing to a front side of the main casing to form the face.