The utility model relates to a nanometer quick preheating device of hardware that moulds plastics, it includes the workstation and establishes the product carrier in the workstation top, the product carrier is used for placing the hardware that preheats, be equipped with the hot plate between workstation and the product carrier, the hot plate contacts and heats the product carrier with the product carrier, be equipped with the heating tube in the hot plate, its heating temperature's of heating tube electricity connection control temperature controller, the temperature induction probe who detects the hot plate temperature is connected to the temperature controller electricity, the temperature controller is equipped with the display screen of display control temperature and detection temperature, the temperature controller is according to the specification of different hardwares, the control heating tube is fast to the hot plate heating that heaies up, the hardware is given heat transfer through the product carrier rather than the contact to the hot plate, thereby heating hardware product, the size problem that reduces the hardware to be unworthy of with mold temperature and cause.