The present invention relates to a reinforced glass cutting method and, more specifically, to a reinforced glass cutting method comprising: a jig fixing step of fixing a reinforced glass plate and an etching piece of materials identical to the reinforced glass plate to an etching jig; a primarily etching step of etching the etching piece and a part in which a thermosetting ink pattern is not formed among the reinforced glass plate by spraying an etching solution on the reinforced plate and the etching piece; a piece thickness measuring step of measuring the thickness of the etching piece primarily etched by separating the etching piece primarily etched from an etching device; a backside fixing step of attaching an attachment member on the backside of the reinforced glass plate primarily etched from the etching device; a secondarily etching step of re-etching a part in which the thermosetting ink pattern is not formed among the reinforced glass plate by spraying the etching solution on the reinforced glass plate in a spray method according to the measured thickness; and a cell unit reinforced glass forming step of forming multiple cell unit reinforced glasses by cutting the reinforced glass plate into cell units. The reinforced glass cutting method improves yield in the etching step and increases product reliability by precise process.
