The invention provides a domestic micro methane generator comprising methane tank, ripple gas storage tank and heating air chamber, where the methane tank and the ripple gas storage tank are seal-jointed together mouth to mouth, the outside of the methane tank is coated with heat insulating layer, the bottom of the ripple gas storage tank is equipped with two gas outlets, one connected with gas-fired range and the other connected with liquid level meter, the bottom wall of the methane tank is equipped with left and right openings which are equipped with sealing covers, where the right opening is equipped with a three-way pipe, one mouth of the three-way pipe is connected through the liquid level meter with the ripple gas storage tank and another mouth equipped with valve, the left opening is connect outward with plastic water pipe which extends into the methane tank to connect with multi-use heating air chamber arranged at the bottom of the methane tank, the methane fermenting materials are arranged above the multi-use heating air chamber, the outside of the ripple gas storage tank is equipped with pressing rubber strip whose bottom end is connected at the junction between the methane tank and the ripple gas storage tank. |