The invention discloses a liquid jar-sealing sweet and sour oral liquid process, and belongs to the field of flavouring processing. The process includes (1) preparing glutinous rice and sweet corn which are equal in amount, and separately crushing until the granularity is 40-50 meshes, (2) dipping the crushed glutinous rice and the crushed sweet corn, cooking, spreading and cooling, (3) mixing the glutinous rice with crushed daqu, and saccharifying, (4) adding rich husks and the sweet corn into glutinous rice saccharifying mash, adding aspergillus oryzae and monascus and saccharifying, (5) adding activated dry yeast into the saccharifying mash, and performing alcohol fermentation, (6) adding clear liquor liquid into a liquor earthen jar, scattering daqu onto the surface, sealing the jar and performing acetic fermentation, and (7) filtering and filling. The process is simple and high in glucose utilization rate. The fructose content is high so that a sweetness additive is not needed. A product is proper in sour and sweet taste and can be adopted as an excellent oral liquid.