Rotatable supporting beam dismantling support attached to inner supporting stand column pile

The invention relates to the technical field of engineering construction, in particular to a rotatable support beam dismantling support attached to an inner support column pile, which comprises a main body, an extension body, a hoisting mechanism, a hoisting lifting mechanism, a mounting mechanism and a rotating mechanism, the hoisting mechanism is arranged at the bottom of the main body, and the hoisting mechanism is used for hoisting a support beam; the lifting mechanism is used for driving the lifting mechanism to lift, the mounting mechanism is arranged on the main body, the main body is mounted on an external supporting column pile through the mounting mechanism, and the rotating mechanism is arranged between the main body and the mounting mechanism and used for driving the main body to horizontally rotate relative to the mounting mechanism. The device is installed on a supporting stand column pile through the installation mechanism, after the lifting mechanism is matched to achieve lifting of the suppor