The utility model relates to an electric mosquito swatter, in particular to a foldable electric mosquito swatter. The foldable electric mosquito swatter is characterized in that a swatter face and a swatter handle are arranged separately, a foldable stretching mechanism is arranged at a jointing part between the swatter face and the swatter handle, and the foldable stretching mechanism comprises a hinge and a self-locking mechanism; the hinge comprises a hinge mount and pin rolls; the hinge mount is a pair of separate pedestals arranged at a connecting end of the swatter face; the pin rolls with the same axle center are arranged on the inner sides of the two pedestals that are arranged at the connected end of the swatter face; the swatter handle is a stem including two hollow semi-shells; connecting flat blocks of a compound rod are matched between the two pedestals that are arranged at the connected end of the swatter face in a sliding manner; and semi-circular holes are formed at the centers of the connecting flat blocks respectively, wherein, the semi-circular holes are matched with the pin rolls with the same axle centers on the inner sides of the pedestals on the swatter face in a sliding manner. Because the hinge that can be converted and stretched and the self-locking mechanism are arranged at the jointing part between the swatter face and the swatter handle of the electric mosquito swatter which is executed according to the scheme, the convenience for freely folding and stretching can be achieved as compared with an original integral-type electric mosquito swatter, and relatively, the foldable electric mosquito swatter has simple structure, and achieves the beneficial effect of convenient carrying.