Artificial diamond production device and microwave transmitting module thereof

The invention relates to an artificial diamond production device and a microwave transmitting module thereof. The microwave transmitting module is used for transmitting microwaves to a diamond carrying table in a reaction cavity; the reaction cavity is provided with a microwave window; one side, facing the microwave window, of the diamond carrying table is provided with a focusing area; the microwave transmitting module is positioned outside the reaction cavity and comprises a microwave generator, a focusing lens and a focusing mechanism; the microwave generator transmits microwaves to the diamond carrying table through the microwave window; the focusing lens is located between the diamond carrying table and the microwave generator and concentrates microwaves of the microwave generator; and the focusing mechanism is connected with the focusing lens and can change the spacing distance between the focusing lens and the microwave generator, so that the microwaves of the microwave transmitting module are kept to