The invention relates to a composite insulator manufacturing device in high-tension power transmission and transformation equipment, and provides a composite insulator manufacturing mould which comprises a lower mould, an upper mould, an electric heating board, a thermal baffle and a water carrying board, wherein the water carrying board is provided with a main glue channel and a water channel inside, a water jacket is installed below the water carrying board, and is provided with a center hole channel which is communicated with the main glue channel in the water carrying board, a water inlet cavity and a water outlet cavity which are communicated in series with the water channel in the water carrying board; the water jacket threads through the thermal baffle, the electric heating board and the upper mould; the lower tail end of the water jacket is flatly sealed by a machine mouth and a machine mouth mounting plate which are embedded in the upper mould; and the center hole channel of the water jacket is communicated with a runner of the upper mould. The composite insulator manufacturing mould has the characteristics that since a glue injection channel is designed into a cold glue channel, silicon rubber in the glue injection channel does not vulcanize and harden in the operation process, and can be continuously used, thereby saving materials; meanwhile, the runner on the mould can be shortened by arranging a branch glue injection channel, which further reduces the waste of the silicon rubber on the branch glue injection channel in the manufacturing process, and the mould is convenient for cleaning.