Steam turbine installation hoisting support

The utility model belongs to the technical field of impeller hoisting, and particularly relates to a steam turbine mounting and hoisting support which comprises a main support and two hoisting ropes fixedly connected to the bottom end of the main support, telescopic parts are arranged at the two ends of the main support, locking ends are fixedly connected to the ends of the telescopic parts, a transmission bin is fixedly connected to the locking ends, and the transmission bin is fixedly connected to the main support. The bottom end of the transmission bin is rotationally connected with an alignment support, the side, away from the transmission bin, of the alignment support is rotationally connected with a chuck, and the driving shaft is in transmission connection with the alignment support through the transmission bin. When the alignment support is located on the upper portion, the impeller is fixed, when the alignment support is located on the lower portion and the impeller descends, the impeller is guided i