The utility model discloses a layer-stacked gas cylinder support which comprises a bottom support which is provided with at least two parallel first-layer gas cylinders. All parallel gas cylinders on the first layer are fixed on the bottom support through a plurality of first arc hoops respectively; second-layer gas cylinders are arranged in longitudinal grooves formed between all first-layer gas cylinders respectively through fixing devices. Compared with the prior art that a gas cylinder support is of a double-layer frame structure, the layer-stacked gas cylinder support has no outer frame, is simple in structure, lowers the overall vehicle weight, effectively avoids stress concentration, and lowers the requirement for design strength of a luggage compartment. The space utilization of the luggage compartment is optimized, more gas cylinders can be installed in an effective space, and the layer-stacked structure enables gas cylinders to be simply and conveniently assembled on site, installed and transported.