The utility model relates to a liquid filling apparatus for fodder, which comprises a liquid supplying apparatus, a dry material supplying box, an adding chamber and a control part, wherein the adding chamber comprises a shell body; a dry material inlet is arranged on the shell body; the dry material supplying box which is provided with a material discharging door is arranged on the dry material inlet; the lower part of the dry material inlet is tightly connected with a bending material discharging sliding path; a material discharging mouth is arranged under the bending material discharging sliding path; the bending material discharging sliding path and a weighing instrument at the side face of the bending material discharging sliding path are coaxially connected and arranged on the shell body; the weighing instrument, the dry material supplying box and the control part are connected by electric signals; a nozzle of the liquid supplying apparatus faces to the material discharging mouth. The utility model supplies the accurate control of the processes of the measurement of enzymes, the even mixture of the enzymes and water, main stream measurement and the spray of the enzymes.