Low-floor tramcar roof and side wall connection structure

The invention relates to a low-floor tramcar roof and side wall connection structure which comprises a column, a side wallboard, a vehicle roof plate, a vehicle roof beam, connecting bases and a connecting plate. The side wallboard is fixedly welded to the column, the vehicle roof beam is fixedly welded to the vehicle roof plate, the bottom edge of each connecting base is fixedly welded to the upper end of the column, the outer end of the connecting base is fixedly welded to the side wallboard, the inner end of the connecting base is fixedly welded to the connecting plate, and the connecting plate is fixedly welded to the end of the vehicle roof beam. The low-floor tramcar roof and side wall connection structure can meet the vehicle roof bearing requirements well, the connecting bases of a different number can be arranged flexibly according to the weight bearing difference of different areas of the vehicle roof, and accordingly the weight reduction of the vehicle body structure is facilitated.