The invention discloses a drawer sliding mechanism and a refrigerator comprising the same. The drawer sliding mechanism is used for pulling a drawer out of a refrigerator body or pushing the drawer into the refrigerator body and comprises a first sliding assembly and a second sliding assembly which are oppositely arranged. Each sliding assembly comprises a sliding strip and a sliding groove which are matched with each other. The sliding strips are arranged on the side edge of the drawer. The sliding grooves are formed in a refrigerator body inner container. Each sliding assembly further comprises a rack and a gear assembly which are matched with each other. The racks are located on the side edge of the drawer. The gear assemblies are located on the refrigerator body inner container. Each gear assembly comprises a gear which can rotate in situ. When the drawer is pulled out or pushed into the refrigerator body, the gears are always engaged with the racks. According to the drawer sliding mechanism and the refrigerator comprising the same, when the racks move along with the drawer, the gears of the gear assemblies are always engaged with the racks, and thus the support of the gears to the racks and the support between the sliding strips and the sliding grooves form a triangular support, so that the drawer is stably supported.