Heat preservation protection plate for waste heat boiler of gas turbine

The utility model relates to the technical field of gas turbine waste heat boiler heat preservation, in particular to a gas turbine waste heat boiler heat preservation protection plate which comprises a first chimney section and a second chimney section which are adjacent and matched, the lower end of the first chimney section is fixedly connected with a first heat preservation protection plate, and the upper end of the second chimney section is fixedly connected with a second heat preservation protection plate. The driving rod is rotated to drive the traction rod to deflect through the driving block, the traction rod drives the opening and closing plate to deflect, so that the opening and closing plate is in a horizontal state, the fixing rod is lifted upwards, the limiting piece is rotated to extrude the top end of the first heat preservation protection plate, and the second heat preservation protection plate is limited through the opening and closing plate; in this way, the flange extrudes the sealing gask