The invention discloses an insulating sleeve and an insulating pipe. The insulating sleeve comprises an insulator, a head part and a tail part, wherein the insulator comprises a middle umbrella skirt part and a lower flange; the lower flange is connected to the lower end of the umbrella skirt part; the head part comprises an oil conservator and a wiring terminal; the oil conservator is connected to the insulator; the wiring terminal is connected to the oil conservator; the tail part is connected to the lower end of the insulator; the tail part comprises the insulating pipe; and the insulating pipe is made of a glass fiber-reinforced plastic material. The insulating pipe can be manufactured by the processes of filament winding, resin casting and the like. According to the insulating sleeve and the insulating pipe disclosed by the invention, connection is relatively convenient; the problem of sealing difficulty is solved; the sealing effect is good; and the cost is reduced.