A pipeline for capturing and utilizing CO2 produced through metallurgy comprises a CO2 capturing part, a CO2 extracting and purifying part, a CO2 pressurizing and storing part, a CO2 distributor and a pipeline monitoring device which communicate with one another sequentially, wherein the CO2 extracting and purifying part is connected with the CO2 pressurizing and storing part by the aid of a CO2 delivering pipeline, and the CO2 pressurizing and storing part is connected with the CO2 distributor by the aid of the CO2 delivering pipeline; spherical tanks are distributed and serially connected on the CO2 delivering pipeline, a pressurizing pump is arranged on an inlet pipeline of each spherical tank, and a pipeline assembly and a gas emitting device are sequentially arranged on an outlet pipeline of each spherical tank. CO2 at a flow section where CO2 is produced in the metallurgical process is captured in real time, is extracted, purified, pressurized, stored and delivered, and is finally applied to various technical fields which consume CO2, such as the oilfield flooding field, the crop cultivation production field and the like by the CO2 distributor via terminal user pipelines.