Oval LNG cylinder

The invention relates to an oval LNG gas cylinder. The oval LNG gas cylinder comprises an inner container and an outer container. Reinforcing rings are respectively arranged at the top end, the middle part and the bottom end of the inner wall of the outer container; reinforcing rings are respectively arranged at the top end, the middle part and the bottom end of the outer wall of the inner container; the width of the reinforcing ring ranges from 40 mm to 50 mm. According to the oval LNG cylinder, the inner wall of the outer container and the outer wall of the inner container are arranged in a matched mode through the specifically-designed reinforcing ring structures, stress concentration points are redistributed after the reinforcing ring structures are arranged, and therefore the stress of the bottom of the oval LNG cylinder is reduced; meanwhile, due to the specific design of the reinforcing ring, the strength of the bottle body is improved on the basis that local thickening is achieved. 本发明涉及一种椭圆形LNG气瓶，所述椭