The invention discloses a method for manufacturing an insulating lamp cap. The method comprises a first step of preparing a lamp cap body; a second step of arranging a driver, placing the driver in the lamp cap body, and dragging a connecting pin on the driver to the position of an insertion part to facilitate connection with a lamp body; a third step of preparing high-insulation stable glue, slowing pouring the high-insulation stable glue in the lamp cap body until the lamp cap body is filled with the high-insulation stable glue, and completely submerging the driver so that the driver is stably positioned and sealed in the lamp cap body. The preparation method is simple, a product is reasonable in structural design, all-closed structure design is adopted, the insulating lamp cap has the advantages of being high in resistivity, good in insulation and capable of effectively isolating a heavy current and a weak current and conforming to safety regulations, the safety is high, the possibility of electric shock is avoided, the insulating lamp cap is also quick in heat conduction and good in heat dissipation effect, and the service life of the insulating lamp cap is greatly prolonged.