The invention relates to flame-retardant and insulating type organosilicon sealing glue. The flame-retardant and insulating type organosilicon sealing glue is prepared from, by weight, 20 parts to 50 parts of methyl vinyl polysiloxane, 45 parts to 80 parts of fire retardants, 5 parts to 10 parts of tackifiers and 3 parts to 5 parts of iron oxide red. According to the flame-retardant and insulating type organosilicon sealing glue, the requirements of the GB 23864-2009 Fireproof Sealing material are met, and the flame-retardant and insulating type organosilicon sealing glue further has good insulating property and good water resistance; meanwhile, good adhesivity to metal, plastics and rubber is achieved, and after being used for sealing, the flame-retardant and insulating type organosilicon sealing glue is free of deformation, hardening and falling.