Stone sheet material chain saw cutting machine

The utility model discloses a stone sheet material chain saw cutting machine. The stone sheet material chain saw cutting machine comprises a cutting mechanism, a lifting support mechanism, a tensioning mechanism and a worktable mechanism, wherein the lifting support mechanism can drive the cutting mechanism to move up and down; the cutting mechanism is of a quadrilateral framework structure which is formed through encircling four chain wheels by a chain saw blade, and at least one big chain wheel is a driving wheel; the tensioning mechanism can adjust the distance between two small chain wheels, so as to realize the adjustment on tensity; the worktable mechanism is mounted below the cutting mechanism and is used for placing or mounting a workpiece. According to the stone sheet material chain saw cutting machine, the whole cutting mechanism rises/falls together with the tensioning mechanism, so that dynamic tensity adjustment is not required during machining, the problem of chain saw blade jittering cannot occur, and the cutting effect cannot be effected; the driving wheel is arranged on one big chain wheel below a square frame, so that the cutting speed can be increased, the cutting efficiency is increased, cut faces of cut sheet materials are good in flatness and high in accuracy, and the comprehensive benefits are more remarkable.