The utility model discloses a combined insulation isolation device, which solves the problem that the size, the installation height and the angle of an insulation baffle plate in the prior art are noteasy to adjust at any time, and has the effects of increasing the area of the insulation plate, adjusting the installation height and the installation angle and being suitable for different installation parts. According to the technical scheme, the device comprises an isolation insulating plate, isolation insulating cloth, a height adjusting mechanism, an angle adjusting mechanism and a clampingmechanism, unfolding plates are rotatably connected to the two sides of the isolation insulating plate, and foldable isolation insulating cloth is connected between the unfolding plates and the isolation insulating plate; the isolation insulating plate is connected with one end of the angle adjusting mechanism through the height adjusting mechanism, and the clamping mechanism is fixed to the otherend of the angle adjusting mechanism. The angle adjusting mechanism comprises a first connecting plate and a second connecting plate, and the two sides of the first connecting plate and the two sidesof the second connecting plate are connected through rotating mechanisms. The clamping mechanism comprises a first clamping jaw and a second clamping jaw which are rotationally connected, and the first clamping jaw and the second clamping jaw are connected through a threaded telescopic mechanism.