The invention discloses a method for manufacturing an elevator flanged plate through a one-armed draw bender. The method comprises the process steps that the head end of the flanged plate is installed on and fixed to a die, a first fixture clamps the tail end of the flanged plate, and a second fixture clamps the middle of the flanged plate; a rotary shaft drives the die to rotate so that the flange plate can be subjected to preliminary draw bending forming treatment; the rotary shaft stops rotating, the second fixture is disassembled, and a third fixture is installed at the joint of a tabulate part and a bending forming part of the flanged plate and is used for preventing the flanged plate from being arched and deformed; the rotary shaft drives the die to rotate till draw bending forming of the flanged plate is completed; and the flanged plate is disassembled. According to the method for manufacturing the elevator flanged plate, the elevator flanged plate is produced through the one-armed draw bender, so that the production cost is significantly reduced.