Energy dispersive X- ray scattering (EDXRS) technique is an effective method for identification of sorts of liquids. In this experiment, the polycapillary X-ray half optics is used to replace the slits of the EDXRS to identify the sorts of the liquid samples. The experimental results show that alignment system consists of the two polycapillary X- ray half optics can improve the efficiency of X- ray source and the resolution of the scattering spectrum. The EDXRS with polycapillary X-ray half optics is an appropriate method to identify the sorts and concentrations of liquids, and has a widely applications for the identification of sorts of liquids.