The invention relates to a roadway support construction method for a fully mechanized coal mining face passing through extremely-close-distance abandoned roadway. The method comprises support construction when horizontal pushing is adopted between a cut roadway and an abandoned roadway, support construction when the manner adopted between the cut roadway and the abandoned roadway is converted intolift up of the abandoned roadway from horizontal pushing, and support construction when the relation between the cut roadway and the abandoned roadway is converted into abandoned roadway step-missingfrom horizontal pushing. The support construction when horizontal pushing is adopted between the cut roadway and the abandoned roadway comprises support of a foundation anchor cable and a reinforcedanchor cable on a top plate and wood stack support. The support construction when the manner adopted between the cut roadway and the abandoned roadway is converted into lift up of the abandoned roadway from horizontal pushing comprises anchor cable dense support and a special coal cutting mode, and the support construction when the relation between the cut roadway and the abandoned roadway is converted into abandoned roadway step-missing from horizontal pushing comprises supplementary anchor cable support and I-shaped shed cooperating with #-shaped wood stack support. According to the supporting construction method, the technical problem that the fully mechanized face passes through the extremely-close-distance abandoned roadway is effectively solved, high-efficiency recovery of an original abandoned roadway coal pillar can be guaranteed through implementation of the method, the yield of raw coal is increased, and good economic benefits are obtained.