The invention provides an ironing-formed cloth cutting device which comprises a cutting table with a horizontal upper plane, wherein a mounting module is designed at the upper part of the cutting table; a lifting module is designed between the mounting module and the cutting table; an assembly rail vertically extending downward is designed at the lower part of the lifting module; a metal edge is mounted at the lower part of the assembly rail; a pair of fixing sleeves vertically facing downward and assembled on the two sides of the assembly rack respectively is assembled at the lower part of the lifting module; a sliding shaft is glidingly assembled in the fixing sleeve and extends out of the lower part of the fixing sleeve; the lower part of the sliding shaft is connected with a square tube; the upper part of the square tube is connected with the lower part of the fixing sleeve through a spring; and when the square tube is naturally placed, the lower part of the square tube is lower than the lower part of the metal edge. In the device, by heating the metal edge, the fabric can be formed by once ironing, the forming is faster, and the production efficiency is higher.