Modularized U-turn device and U-turn method suitable for multiple models

The invention relates to a modularized U-turn device suitable for multiple types and a U-turn method. The modularized U-turn device suitable for the multiple types comprises a bottom platform, a middle platform, a top platform, a lifting device, a driving device and a connecting device. The lifting device is arranged on the bridge, the bottom platform is connected with the lifting device, and the lifting device is used for driving the bottom platform to move in the vertical direction. The middle platform is rotationally connected with the bottom platform, and the driving device is connected between the middle platform and the bottom platform and used for driving the middle platform to rotate. The top platform is connected with the middle platform and connected with the gravity center position of a main beam of the bridge girder erection machine through a connecting device. For different types of bridge erecting machines, the same set of modularized turning device and lifting device can be adopted to jack the