Abstract: Wire rope deviation angle has a direct influence on winding regularity of double broken-line wire rope. Hence, the section element of the double broken-line wire rope is chosen as analysis object, and the mechanical model for the double broken-line drum is constructed under constant velocity in the present paper. Besides, analysis by the above model shows when the wire rope deviates backward, the extrusion force on wire rope will increase with the increase of wire rope deviation angle, but it hardly happens to “riding the wire rope”; when the wire rope deviates onwards and the wire rope deviation angle is greater than helical angle of the wire rope groove, “wire rope skipping” will happen, and the greater the wire rope deviation angle the easier it happens. Based on the above mechanical model, an engineering case was calculated and analysized and the results indicates the wire rope deviation angle of the parallel wire rope groove determines whether the “wire rope skipping” will happen, and the “wire rope skipping” is prone to happen in the greater tension. Theoefore, the mechanical analysis model for double broken-line wire rope can provide a theoretical basis for the parameter design of hoisting winder and the selction of wire rope.