The invention relates to the field of production and processing of liquid sugar and in particular relates to a production line of the liquid sugar. The production line has a three-layered structure comprising a top layer, a middle layer and a bottom layer; a sugar dissolving pot is arranged on the top layer; a filter and a cooling tank are arranged on the middle layer; a liquid filling machine isarranged on the bottom layer; the lower side of the sugar dissolving pot is communicated with one end of the filter; the other end of the filter is communicated to the cooling tank; the lower side ofthe cooling tank is communicated to the liquid filling machine. The production line of the liquid sugar, provided by the invention, has the three-layered structure; the sugar dissolving pot is arranged on the top layer; the filter and the cooling tank are arranged on the middle layer; the liquid filling machine is arranged on the bottom layer; raw materials are fed from a feeding opening of the sugar dissolving pot; after the raw materials are processed through technologies including sugar dissolving, filtering, cooling and the like, a liquid sugar finished product enters the liquid filling machine and is subjected to packaging treatment; automatic equipment replaces human labor, so that the production efficiency is improved and the production cost is reduced.