U-shaped SCR diesel postprocessor assembly support assembling tool

The utility model belongs to the technical field of packaging mechanical equipment, and relates to a U-shaped SCR diesel postprocessor assembly support assembling tool which comprises a base assembly, the two sides of the upper surface of the base assembly in the length direction are each provided with a longitudinal support positioning assembly, and longitudinal supports of the two longitudinal support positioning assemblies can be close to or away from each other; positioning clamps are arranged on the two sides of the upper surface of the base assembly in the width direction respectively, and an end positioning assembly is arranged on the outer side of one positioning clamp; the longitudinal support positioning assembly comprises a connecting bottom plate and a guide rail which are fixed to the base assembly, a vertical plate base is fixed to the connecting bottom plate, a side pushing air cylinder is installed on the top of the vertical plate base, a longitudinal support is arranged on the guide rail in a