The invention discloses an all-solution preparation method of a sulphur-doped antimony-selenide nanorod membrane. The method includes the steps of dissolving mixed powder of antimony powder, selenium powder and sulphur powder in a mixed solvent of dithioglycol and ethylenediamine which is obtained in the former step, and stirring the mixed powder until the mixed powder is dissolved; rotatably coating a glass substrate with a precursor solution, drying the glass substrate and then repeating the steps of rotatory coating and drying until the thickness of a precursor membrane on the glass substrate is 900nm-1100nm; conducting annealing at 300-350 DEG C for 10-30 min on the obtained precursor membrane, and finally obtaining the sulphur-doped antimony-selenide nanorod membrane. The preparation method is simple in preparation process, low in cost, convenient to operate and capable of obtaining Sb2(Se1-xSx)3 nanorod membranes which are compact, even and free of impurities.