A cable-stayed sling type cross beam spreader comprises a bottom millstone, a suspension ring, a first clasp, a second clasp and four lower slings. The bottom millstone is provided with four first connecting holes; the first clasp and the second clasp sleeve on the suspension ring; four groups of diagonal members are arranged between the suspension ring and the bottom millstone; each diagonal member group includes a turnbuckle group, an upper sling and an upper clevis; the turnbuckle comprises a nut, an upper screw and a lower screw; the lower end of the lower screw and the upper end of the upper sling are connected through a pin roll; the lower end of the upper sling is connected with the upper end of the upper clevis by a pin roll; the upper end of each upper sling is connected with a lower clevis; lower ends of four upper clevises are respectively connected to four first connecting holes; and the upper ends of the four lower clevises are respectively connected to the four first connecting holes. The cable-stayed sling type cross beam spreader provided by the invention does not produce radial force on the lifting products in the lifting process; the position of the suspension ring can be adjusted; and the stress on the bottom millstone is greatly reduced for lifting products with the same weight.