Laser cutting device workbench and workpiece cutting method adopting same

The invention provides a laser cutting device workbench which is used for bearing workpieces for laser cutting. The workbench comprises a fixing portion and a supporting portion for supporting the workpieces. A containing groove is formed in the fixing portion, and the supporting portion is contained and arranged in the containing groove and is made of stainless steel. An adsorption surface is formed on the supporting portion, a plurality of adsorption holes which communicate with one another are formed in the supporting portion, and part of the multiple adsorption holes penetrate through the adsorption surface to adsorb and locate the workpeices. The fixing portion is provided with a venthole which communicates with the multiple adsorption holes, and the venthole is used for being connected with an external evacuating device. The supporting portion for supporting the workpieces of the workbench is internally provided with the multiple adsorption holes, when air exhausting is conducted on the supporting porti