The invention belongs to the technical field of returned acidized backflow acid gas generated in oil-gas field development, and relates to an oil-gas field acid waste gas skid-mounted treatment device. The oil-gas field acid waste gas skid-mounted treatment device comprises a skid-mounted tubular reactor and an alkali liquor tank, wherein the two ends of the tubular reactor are connected with a gas inlet pipeline and a gas outlet pipeline respectively; a first acid detector, a sprayer and a mixed flow grid are arranged at one end, which is connected with the gas inlet pipeline, of the tubular reactor; a second acid gas detector is arranged at one end, which is connected with the gas outlet pipeline, of the tubular reactor; the sprayer is connected with the alkali liquor tank through a pipeline, and a plunger pump is arranged in the pipeline. A two-stage alkali liquor atomizing, spraying and absorbing system is used for treating acid waste gas generated in an oil-gas field development process, and the acid component content of the treated gas can be lowered below an emission standard. By adopting the oil-gas field acid waste gas skid-mounted treatment device, the problems of damage to human body, environmental pollution and the like due to the acid gas generated in an acidizing, cracking and spraying process of an oil-gas field are solved effectively. The oil-gas field acid waste gas skid-mounted treatment device has the advantages of convenience and easiness in operation, practicability, low running cost and the like, and can be widely popularized and applied to oil-gas fields.