Decomposition-electrolysis device using methane hydrate as fuel cell

The invention relates to a decomposition-electrolysis device using methane hydrate as a fuel cell, which can effectively solve the problem that a large amount of low-concentration coal mine gas in coal mine gas is emptied, and adopts the technical scheme that the decomposition-electrolysis device comprises a reaction kettle body, and a hydrate inlet communicated with the inner wall of the reaction kettle is formed in the reaction kettle body; a temperature sensor and a pressure monitoring module are respectively arranged on the outer wall of the reaction kettle, the inner wall of the reaction kettle is communicated with an oxygen supply tank, a load is arranged at the top of the reaction kettle, and the first load is electrically connected with a methane fuel cell cathode and a methane fuel cell anode through a proton exchange membrane; according to the invention, the fuel cell is formed by taking low-concentration gas as a raw material through a series of reaction treatments, the fuel cell is stored and tran