Auxiliary force transmission casing structure of gas turbine

The invention provides an auxiliary force transmission casing structure of a gas turbine. The casing structure is arranged between a turbine outer ring and a low-pressure turbine rotor outer casing and comprises a left flange edge, a right flange edge and a Y-shaped support structure. A left flange edge and a right flange edge with seam allowance positioning are cooperated and connected with the turbine outer ring and the low-pressure rotor outer casing. By using the auxiliary force transmission casing of the gas turbine, a function of transmitting a force from the low-pressure turbine rotor outer casing to the turbine outer ring is achieved, and at the same time, when a temperature changes, buffering is added for deformation of the auxiliary force transmission casing, a relative positionbetween the low-pressure turbine rotor outer casing and the turbine outer ring is guaranteed, and a problem that the casing deforms unharmoniously due to a temperature difference between an inner ringand an outer ring and the