The invention relates to a fabric spreading machine and belongs to the technical field of textile printing and dyeing machinery. The fabric spreading machine comprises a machine frame, a fabric guide mechanism, a fabric spreading mechanism, an untwisting device, an automatic deflection detection and correction device and a guide-out roller. The fabric spreading machine is characterized in that the untwisting device comprises an untwisting frame base, an untwisting frame, a detection roller, an untwisting fabric guide wheel, a rotary cylinder bearing block, a rotary cylinder, a rotary disk, a pair of untwisting transition wheels and an untwisting servo motor, the untwisting frame base is composed of a first ladder, a second ladder and a platform, one side of a left wallboard of the untwisting frame is provided with a first signal collector, one side of a right wallboard of the untwisting frame is provided with a second signal collector, a first signal trigger coil is fixed to the left end of the detection roller, and a second signal trigger coil is fixed to the right end of the detection roller; the fabric spreading mechanism comprises a first fabric stretching roller, a second fabric stretching roller, a tension roller, a fabric stretching roller driving device, a tension roller driving device and a pair of tension roller manual adjustment devices. The structure is simplified, the response speed of the first signal collector and the response speed of the second signal collector are increased, and reliability of the first signal collector and the second signal collector is improved; deflected fabric is corrected automatically, and strength is relieved; selvages will not curl.