The utility model provides an oil pipe diameter getting-through and scraping device. The oil pipe diameter getting-through and scraping device comprises a columnar body and connectors arranged at the two ends of the body, wherein the body is provided with a plurality of groups of scraping blades; the scraping blades are in a tapered annular shape and each two scraping blades are grouped; small ends of each group of the scraping blades are fitted on the peripheral face of the body and the large ends thereof are reversely mounted. The oil pipe diameter getting-through and scraping device provided by the utility model has a simple structure and low cost; the tool can be operated by only one operator, so that the diameter getting-through and scraping work can be easily finished at the same time; the working principle is simple and the operation is simple, easy, safe and reliable; dirt, impurities and the like on the inner wall of an oil pipe can be rapidly and effectively cleaned, and the inner wall of the oil pipe keeps clean; the oil pipe diameter getting-through and scraping device is practical and efficient and provides powerful guarantees to the post-period production construction; the construction quality is improved; the oil pipe diameter getting-through and scraping device is good for large-scale utilization and popularization and has a wide application value.