A vacuum assembly for a refrigerator includes upper and lower sealing bodies, which are buckled to define a sealed cavity. A vacuum pump is provided in the cavity. A plurality of sheet members are arranged between the vacuum pump and a sealing box. A plurality of abutting parts are provided on the upper sealing body and abutting against tops of the sheet members. A step is provided at an end of the abutting part coming into contact with the sheet member. A top surface of the step abuts against the sheet member, and a side surface of the step abuts against the sheet member. A plurality of ribs are provided on the lower sealing body and spaced apart from the side walls to define limiting grooves. A plurality of guide grooves are provided on the lower sealing body and extend in a vertical direction to guide the sheet members.