The invention provides a gas turbine guider front edge mounting side structure and a gas turbine with the structure. Multiple bosses are arranged on the inner side of a turbine guider front edge mounting side, the bosses are located on the side, close to the force suction face, of the turbine guider blade channel front edge, the gas turbine guider front edge mounting side is in lap joint to the outer side wall face of a combustion chamber outlet portion tail end through the bosses, an auxiliary annular bending plate is in lap joint with the outer side wall face of the turbine guider front edge mounting side, an annular cooling cavity is defined by the annular bending plate, the outer side wall face of the combustion chamber outlet portion and the turbine guider front edge mounting side; multiple airflow holes are formed in the turbine guider front edge mounting side in the circumferential direction of the turbine guider front edge mounting side, the outer sides of the airflow holes are communicated with cooling gas of an air system, and the inner sides of the airflow holes are communicated with the annular cooling cavity. According to the above structure, a secondary air system flow path is optimized, the cooling effect of the gas turbine guider inner and outer ring gas side end wall is improved, and the use amount of cooling air is reduced.