The invention relates to a filling tank. The filling tank includes a tank body, a partition plate, a feeding hole, a discharge hole and an air inlet; the partition plate is arranged in an inner cavity of the tank body and includes a horizontal baffle and a material pipeline, the horizontal baffle divides the tank body into an upper tank body located on the upper portion and a lower tank body located on the lower portion, the material pipeline extends downward to the lower tank body from the horizontal baffle, and the upper end and the lower end of the material pipeline are both open. The feeding hole is formed in the lower tank body, the discharge hole is formed in the upper tank body, and the air inlet is formed in the lower tank body; when materials enter the lower tank body from the feeding hole and meanwhile air is introduced into the lower tank body through the air inlet, under the action of the pressure intensity, the materials go upward and enter the upper tank body through the material pipeline, in the process, sediment in the materials is left in the lower tank body, the sediment-free materials entering the upper tank body enter a filling valve through the material outlet and finally enter a container, and the quality of filling is improved.