A feeding device for a stereoscopic 3D printer, comprising: a first connecting pipe; a second connecting pipe; a feeding power unit; a temperature adjusting device; and a resin vat arranged to contain resin liquid; wherein the temperature adjusting device comprises a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit; and when a temperature of the resin liquid is higher than a preset temperature, the feeding power unit is configured to deliver the resin liquid from the resin vat to a first heat exchange sub-pipeline of the heat exchange pipeline through the first connecting pipe to cool the resin liquid to obtain a cooled resin liquid, and is configured to deliver the cooled resin liquid back to the resin vat through the second connecting pipe, when the temperature of the resin liquid is lower than the preset temperature, the feeding power unit is configured to deliver the resin liquid from the resin vat to a second heat exchange sub-pipeline of the heat exchange pipeline through the first connecting pipe to heat the resin liquid to obtain a heated resin liquid, and is configured to deliver the heated resin liquid back to the resin vat through the second connecting pipe; wherein the temperature adjusting device further comprises a heating module and a refrigeration module; wherein the refrigeration module comprises a cooling block and a refrigeration component, the first heat exchange sub-pipeline is provided between the cooling block and the refrigeration component, and the first heat exchange sub-pipeline is attached to the refrigeration component and the cooling block, so that when the resin liquid circulates in the first heat exchange sub-pipeline, the cooling block and the refrigeration component cool the resin liquid flowing in the first heat exchange sub-pipeline; and wherein the heating module comprises a heat sink, a fan and a heating component, the second heat exchange sub-pipeline is provided between the heat sink and the heating component, and the second heat exchange sub-pipeline is attached to the heat sink and the heating component, so that when the resin liquid circulates in the second heat exchange sub-pipeline, the heat sink and the heating component heat the resin liquid flowing in the second heat exchange sub-pipeline. a first connecting pipe; a second connecting pipe; a feeding power unit; a temperature adjusting device; and a resin vat arranged to contain resin liquid; wherein the temperature adjusting device comprises a heat exchange pipeline, a liquid intake end of the heat exchange pipeline is connected to a first end of the first connecting pipe, a liquid output end of the heat exchange pipeline is connected to a first end of the second connecting pipe, a second end of the first connecting pipe and a second end of the second connecting pipe are both located in the resin vat, at least one of the first connecting pipe and the second connecting pipe is provided with the feeding power unit; and when a temperature of the resin liquid is higher than a preset temperature, the feeding power unit is configured to deliver the resin liquid from the resin vat to a first heat exchange sub-pipeline of the heat exchange pipeline through the first connecting pipe to cool the resin liquid to obtain a cooled resin liquid, and is configured to deliver the cooled resin liquid back to the resin vat through the second connecting pipe, when the temperature of the resin liquid is lower than the preset temperature, the feeding power unit is configured to deliver the resin liquid from the resin vat to a second heat exchange sub-pipeline of the heat exchange pipeline through the first connecting pipe to heat the resin liquid to obtain a heated resin liquid, and is configured to deliver the heated resin liquid back to the resin vat through the second connecting pipe; wherein the temperature adjusting device further comprises a heating module and a refrigeration module; wherein the refrigeration module comprises a cooling block and a refrigeration component, the first heat exchange sub-pipeline is provided between the cooling block and the refrigeration component, and the first heat exchange sub-pipeline is attached to the refrigeration component and the cooling block, so that when the resin liquid circulates in the first heat exchange sub-pipeline, the cooling block and the refrigeration component cool the resin liquid flowing in the first heat exchange sub-pipeline; and wherein the heating module comprises a heat sink, a fan and a heating component, the second heat exchange sub-pipeline is provided between the heat sink and the heating component, and the second heat exchange sub-pipeline is attached to the heat sink and the heating component, so that when the resin liquid circulates in the second heat exchange sub-pipeline, the heat sink and the heating component heat the resin liquid flowing in the second heat exchange sub-pipeline.