The invention discloses an injection molding mold of an electric detonator tight opening plastic plug component without the insulated wire pressing and burning damage defect, and belongs to the field of fire chemical engineering, aiming to solve the problem that an electric detonator tight opening plastic plug component manufactured by the existing mold has the electric firing insulated wire pressing and burning damage defect, and the defect exists for a long time and is not solved effectively. The mold comprises an upper mold and a lower mold matched with the upper mold. The injection molding mold provided by the invention is improved based on the existing mold, and after improvement, the electric firing insulated wire pressing and burning damage problem is solved effectively, which has significant importance on the improvement of the integral quality level of the electric detonator. By the actual comparison by the inventor, after the electric detonator tight opening plastic plug component which is manufactured by adopting the existing mold is assembled into finished product detonators after secondary screening, the number of detonators which have the electric firing insulated wire pressing and burning damage defect are 6-10 pieces in each 400 pieces; but the electric detonator tight opening plastic plug component manufactured by the injection molding mold provided by the invention, problem products are not found in the manufactured 5 million pieces.