The invention relates to the field of disposable hygienic products, in particular to an elastic 
waistline manufacturing device which comprises a rack, and an elastic film unwinding mechanism, a low-speed driving roller, a high-speed driving roller, a composite 
station, a fastening device, a middle driving roller, a 
cutting device, a tension buffering mechanism and an output driving roller which are arranged on the rack according to an 
assembly line. An upper non-
woven fabric conveying mechanism and a lower non-
woven fabric conveying mechanism are arranged on the portion, located at a composite 
station, of the rack, a plurality of 
welding point positions are arranged on the fastening device, a partition line is formed by the 
welding point positions, the included angle between the projection of the partition line on the horizontal plane and the advancing direction of the 
assembly line is 25-35 degrees, and the 
cutting device is provided with a plurality of 
cutting parts used for forming cutting units on sheets. The technical problem that an elastic 
waistline manufacturing device which can achieve good breathability and is comfortable to wear does not exist in the field of existing disposable hygienic products is solved.