Method for installing cathode carbon block without disassembling upper part of tank and movable bracket

The invention relates to the technical field of aluminum electrolysis, in particular to a mounting method and a movable support for a cathode carbon block without dismounting the upper portion of a cell, and the mounting method comprises the following steps: S1, mounting the movable support on the A surface of the electrolytic cell and arranging two hoist cranes; s2, a steel rope is sleeved to lift the cathode carbon block from the B surface of the electrolytic cell, and the length direction is in the width direction of the electrolytic cell; s3, a second hanging sleeve hung on a second hoist crane is used for hanging the end A of the cathode carbon block, and the end B of the cathode carbon block is put down to be in lap joint with the cell shell; s4, changing the sleeve steel rope into a hanging steel rope, hanging the end B of the cathode carbon block, and enabling the end B to be separated from the tank shell; s5, hanging a first hanging sleeve on the first hoist crane, and sleeving the first hanging slee