Ultra-wide bridge girder erection machine

The invention discloses an ultra-wide bridge girder erection machine and belongs to the technical field of bridge girder erection machines. After the first hanging beam shoulder pole inclines when thebeam is erected, the shoulder pole hydraulic system controls the balance hydraulic cylinder to adjust, the inclination of the first hanging beam shoulder pole can be adjusted through stretching and retracting of the balance hydraulic cylinder, and the effect of stable lifting of the beam plate is achieved; the auxiliary hoisting device and the auxiliary hoisting winch can hoist other small-weightobjects, so that the practicability of the bridge girder erection machine is improved; the front adjusting supporting leg of the first front supporting leg assembly and the front adjusting supportingleg of the second front supporting leg assembly are connected and fixed through the supporting leg supporting cross beam, the effect that the front adjusting supporting leg of the first front supporting leg assembly and the fr