A united dry coal beneficiation system combining the FGX separator with the air-dense medium fluidized bed separator was firstly established basing on careful considerations for the recent situation of dry coal preparation at home and abroad. The main equipment and the process flow of the United System are described in detail. The separation performance of the United System was accessed by separating run-of-mine coal from an open-pit mine in the Wuhai Region. The results showed that the Ep value of the roughing stage and the cleaning stage of the United System were 0.13 g/cm³ and 0.055 g/cm³, respectively. Finally, the United System reduced the ash content of the feed coal by 24.87% and increased the calorific value by 10.32MJ/kg. This result evidenced that the United System had excellent separation ability.