NOVELTY - A square direct ethanol fuel cell stack with gel mobile phase, comprises a cell shell equipped with an outer electrode and an inner electrode. The outer electrode and the shell are in linear contact connection through the welding point. The inner electrode and the outer electrode consist of a gel mobile phase chamber. The composition of the gel mobile phase contains (in weight%) ethanol (5-75), sulfuric acid (10-40), water (10-40), mixed acid (2-10), conductive polymer and/or metal powder (1-10), and metal organic compound or metal salt (1-20).    USE - Square direct ethanol fuel cell stack with gel mobile phase.    ADVANTAGE - The square direct ethanol fuel cell stack has excellent performance. The damage of catalyst is reduced. The gel mobile phase has high proton-and-electron conduction capability.    DETAILED DESCRIPTION - A square direct ethanol fuel cell stack with gel mobile phase, comprises a cell shell internally equipped with an outer electrode and an inner electrode. The outer electrode and the shell are in linear contact connection through the welding point. The inner side of the inner electrode and the shell, and the outer shell and the shell separately has an air chamber. The inner electrode and the outer electrode consist of a gel mobile phase chamber. The composition of the gel mobile phase contains (in weight%) ethanol (5-75), sulfuric acid (10-40), water (10-40), mixed acid (2-10), conductive polymer and/or metal powder (1-10), and metal organic compound or metal salt (1-20). The inner and the outer electrodes are thermo-compression membrane electrode, formed by compounding porous titanium plate, anode catalyst, gel mobile phase, cathode catalyst, diffusion layer and porous titanium plate sequentially. The cell shell is plastic, stainless steel or pure titanium material. The mixed acid is fluosulfonic acid, phosphotungstic acid, phosphomolybdic acid, silicotungstic acid or phosphoric stannic acid. The metal powder comprises silver, gold or copper powder. The metal organic compound is titanic acid ester or silicon ester. The metal salt is sodium silicate. The diffusion layer consists of the porous carbon fiber paper or carbon fiber cloth.