A feeding device, comprising: a resin vat ; a driving device ; and a conveying device ; wherein the driving device is connected to the resin vat , the driving device is connected to a container filled with a resin liquid through the conveying device , and the interior of the container is further connected to the resin vat through the conveying device ; wherein the conveying device comprises a container cover , a first connecting pipe and a second connecting pipe , the first connecting pipe and the second connecting pipe are arranged on the container cover , the container cover is connected to the container , the first connecting pipe is penetrating the container cover , a first end of the second connecting pipe is located inside the resin vat , and a second end of the second connecting pipe is arranged inside the container ; and wherein the driving device is configured to input gas into the container through the conveying device when a height of the resin liquid inside the resin vat is lower than a first preset height, wherein the conveying device is configured to convey the resin liquid inside the container into the resin vat , characterized in that the driving device includes a fixed seat , an elastic component , and a rotating component , wherein the fixed seat is connected to the resin vat , a first end of the elastic component is connected to the fixed seat , and a second end of the elastic component is connected to the rotating component such that the driving device is movably connected to the resin vat and a rotatable lift of the rotating component is controllable through the elastic component . a resin vat ; a driving device ; and a conveying device ; wherein the driving device is connected to the resin vat , the driving device is connected to a container filled with a resin liquid through the conveying device , and the interior of the container is further connected to the resin vat through the conveying device ; wherein the conveying device comprises a container cover , a first connecting pipe and a second connecting pipe , the first connecting pipe and the second connecting pipe are arranged on the container cover , the container cover is connected to the container , the first connecting pipe is penetrating the container cover , a first end of the second connecting pipe is located inside the resin vat , and a second end of the second connecting pipe is arranged inside the container ; and wherein the driving device is configured to input gas into the container through the conveying device when a height of the resin liquid inside the resin vat is lower than a first preset height, wherein the conveying device is configured to convey the resin liquid inside the container into the resin vat , characterized in that the driving device includes a fixed seat , an elastic component , and a rotating component , wherein the fixed seat is connected to the resin vat , a first end of the elastic component is connected to the fixed seat , and a second end of the elastic component is connected to the rotating component such that the driving device is movably connected to the resin vat and a rotatable lift of the rotating component is controllable through the elastic component . <EOS>