Sawing depth is an important parameter related to diamond abrasion, effective sawing, force of saw blades and the properties of sawn stone. Generally speaking, when the diamond circular saw Blade's line speed is high, should choose the small cut the elimination depth, from the present technology, sawing diamond depth can choose between 1mm~10mm. When sawing granite blocks with large-diameter saw blades, the cutting depth can be controlled between the 1mm~2mm and the feed speed should be lowered at the same time. When the wire speed of diamond circular saw blades is large, large cutting depth should be chosen. However, when the performance of the Saw machine and the tool strength permit range, the cutting concentration should be taken as much as possible to improve the cutting efficiency. When the machining surface is required, small depth cutting should be used.