The invention relates to the field of spinning devices and discloses a feed tank and a spinneret mechanism which are used for an electrostatic spinning device. The feed tank comprises a body and N liquid containing boxes, wherein N is a natural number greater than or equal to 2. A pressurization mechanism is arranged in the body. N box grooves are further formed in the surface of the body, and the liquid containing boxes are installed on the box grooves in a one-to-one corresponding mode and are connected with the pressurization mechanism. N inserting grooves for installing spinneret plates of the electrostatic spinning device are further formed in the surface of the body, the N spinneret plates are also installed in the inserting grooves in a one-to-one corresponding mode and are connected with the pressurization mechanism and the liquid containing boxes respectively. The pressurization mechanism is used for supplying pressure to the spinneret plates and the liquid containing boxes. Spinneret liquid in the liquid containing boxes flows towards the spinneret plates under the pressure effect, and spinneret liquid in the spinneret plates is sprayed out under the pressure effect. The spinneret mechanism adopting the feed tank is simple in structure, and the proportion of polymers in fiber can be conveniently adjusted.