Carbon dioxide electrocatalytic reduction device with multiple-effect water removal function

The invention discloses a multi-effect water removal carbon dioxide electrocatalytic reduction device which comprises an electrocatalytic device body, an electric heating device, a gas path structure and a liquid path structure. The gas path structure comprises a gas analysis instrument, a vacuum pump, a carbon dioxide gas source and a dryer; the carbon dioxide gas source is communicated with a gas path inlet of the electro-catalysis device body through the dryer, a gas path outlet of the electro-catalysis device body is connected with a conveying pipe and a vacuum pump in parallel through an electric control three-way valve, and gas outlets of the conveying pipe and the vacuum pump are connected to the gas analysis instrument in parallel. The gas analysis instrument (5) is connected to a gas pipeline output pipe to output a gas product, and the electric heating device is used for heating the electro-catalysis device main body. After it is detected that the reduction range of the carbon monoxide concentration