The deformation process of thin strip rolling by hot-rolled rod is simulated and tested by Φ130 mm two-high rolling mill in laboratory using Φ11 mm lead bar to replace hot-rolling rod. Result show that for thickness of thin strip is 1.2 mm the spread can increase by 35.37% by using longitudinal-rolling method

and with increasing the deformation

the change of spread is small； by using diagonal method with decreasing the bite angle the spread increases obviously

the imitate-defined spread formula △b =28.67- 0.26α is obtained

and with bite angle being 20° the width of thin strip is up to 36.12 mm

beside as rolling process is in range of small deformation

with accumulation of reduction the width of rolling piece increases linearly

it is available to get a feasible solution for production of thin-strip with big width-thickness ratio by hot-rolled rod.