The utility model relates to a closed type loading and dedusting device of an oilfield disposal station, which is mainly used for solving the problems that the existing dedusting device of the oilfield disposal station is easy to block a filter screen and poor in dedusting effect during treatment of dust with strong hygroscopicity. The closed type loading and dedusting device is characterized in that an outlet of a loading hopper (1) is connected with a sealed cabin (2), and the sealed cabin (2) is connected with an induced draft dedusting system (4) through an induced draft pipe (3) at the upper part of the sealed cabin (2). The dedusting device has the characteristics of closed dedusting, no overflow of dust and good dedusting effect.