The invention relates to a heat preservation partition plate connecting accessory, and belongs to the technical field of fabricated buildings. The heat preservation partition plate connecting accessory comprises a first connecting plate and a second connecting plate which are arranged in parallel, wherein a lifting device is arranged between the first connecting plate and the second connecting plate, the lifting device is used for driving the first connecting plate and the second connecting plate to be close to each other or away from each other, the two sides, away from each other, of the first connecting plate and the second connecting plate are used for being fixedly connected with a heat preservation partition plate and a section steel beam correspondingly, and a joint mixture is arranged between the first connecting plate and the second connecting plate. According to the scheme, a gap between the heat preservation partition plate and the section steel beam is effectively filled, so that the connection between the heat preservation partition plate and the section steel beam is firmer, then the connection strength between the heat preservation partition plate and the section steel beam is enhanced, and the installation stability of the heat preservation partition plate is effectively improved.