Diesel engine cold test production line

The utility model relates to a diesel engine production line, in particular to a diesel engine cold test production line, and belongs to the technical field of diesel engine production. The diesel engine cold test production line comprises a first rotary table and a second rotary table. A cold test conveyer line is arranged between the first rotary table and the second rotary table, a first repair section line is arranged on the side, opposite to the cold test conveyer line, of the first rotary table, and a second repair section line is arranged on the side, opposite to the cold test conveyer line, of the second rotary table. A front-end procedure conveyer line is arranged on one side of the first rotary table, and a first gate forward-migration machine and a first cold test rack are arranged on the side, opposite to the front-end procedure conveyer line, of the first rotary table. A back-end procedure conveyer line is arranged on one side of the second rotary table, and a second gate forward-migration machine and a second cold test rack are arranged on the side, opposite to the back-end procedure conveyer line, of the second rotary table. An online cold test can be performed on a diesel engine in the assembly process, the diesel engine is convenient to repair, the diesel engine cold test production line is reasonable and attractive in overall layout, and production organization and logistics arrangement are facilitated.