The insulating silicone grease for x ray high voltage connector joint is made of modified silicone oil, super pure insulating filler and functional additives by special process. It has hv connector, waterproof and creepage resistance. It is designed for insulation, sealing, lubrication and moisture proof of hv connector joints and piezoelectric equipment over 10 kv. It can also reduce the aging of material surface caused by climate instability. Insulated silicone hv connector joints have good electrical insulation and chemical stability, high flash point, low solidification point, wide temperature operation range, little change in consistency with temperature and no solidification. Such hv connector also has excellent lubricity and sealing, good compatibility with most plastics and rubber, excellent water resistance, weather aging resistance, weak acid and alkali resistance, and service life. Life is very long.