Based on the results of the X-ray diffraction experiment, we implement the fractal concept to study the liquid structure of In-80wt% Sn at 300℃. Partially-overlapping multirange fractals in the melt In-80wt%Sn are observed. According to the characteristic of the partially-overlapping multirange fractals, a model of multirange fractals in liquid structure is proposed and the simulated results agree with the experimental data, where the relative error is less than 1.5%. From the fractal analysis, the whole structure of liquid is clearly revealed, and the range of the transition region between the fractals is speculated to be related closely with the properties of the liquid alloys，and the changes of the transition region may disclose the changes of the liquid alloy characteristics.