Expanding mill cantilever trolley

The invention relates to the technical field of steel pipe expanding equipment, in particular to an expanding mill cantilever trolley which comprises a base moving left and right in the horizontal direction. A first lifting arm and a second lifting arm are arranged on the base and arranged left and right in a side-by-side mode in the moving direction of the base. The base drives the first lifting arm and the second lifting arm to move horizontally. The first lifting arm and the second lifting arm are used for storing steel pipes and enable the steel pipes to be parallel, and the steel pipes are both perpendicular to the moving direction of the base. The first lifting arm and the second lifting arm both drive the steel pipes to go up and down. According to the expanding mill cantilever trolley, the double-pipe conveying mode is adopted, and the problem of low efficiency caused by single-pipe conveying of a trolley in the prior art is solved.