The invention relates to an ultra-short distance dredging construction method for a cutter suction dredger dock apron. The ultra-short distance dredging construction method comprises the following steps: step 1, moving in and distributing a cutter suction dredger; after the cutter suction dredger moves in, dropping a steel pile onto a parallel steel pile reset line of the dock apron, and dropping a left lateral moving anchor and a right lateral moving anchor in a back anchoring form; step 2, carrying out cutter suction dredge excavation construction; taking the dock apron as a starting point during construction, dropping a reamer to a designed depth, carrying out fixed-point suction on the dock apron, and enabling the cutter suction dredge to reversely excavate rightwards; when the reamer rightwards swings to an excavation boundary line, lifting a bridge to enable the reamer to leave a mud surface and rightwards swing to a center line of the steel pile idly, wherein a certain included angle is formed between the center line of the steel pile and the dock apron; and advancing a trolley; and step 3, after the cutter suction dredger advances certain distance along the center line of the steel pile, limiting dredging width and lateral moving cable margin, pushing a stem by utilizing an anchor boat for enabling the steel pile to be on the steel pile reset line, and starting construction on next oblique area. The construction method can solve the universal technical problems such as a low production rate, high safety risks and poor quality of such construction.