The invention provides a refrigerator which comprises a refrigerator body and a refrigeration system arranged in the refrigerator body, wherein the refrigerator body is provided with two liners and a shell arranged on the outer sides of the liners; the two liners are adjacently arranged up and down; the refrigeration system comrpsies a compressor, a condenser, a throttling element and an evaporator which are connected with one another; a rear liner wall is arranged on each of the liners; the shell comprises a rear plate; the rear plate and the rear liner wall are arranged at an interval; foaming chambers for containing heat-insulating foaming materials are formed between the rear liner walls of the two adjacently arranged liners and the front side of the rear plate; a compressor is fixed on the inner side of the rear plate and is arranged on the rear side between the two adjacent liners; a flow-guide chamber, through which the foaming materials can pass, is formed between the compressor and the rear liner walls; the flow-guide chamber is communicated with the upper and lower foaming chambers, so that the foaming materials can be upwards or downwards filled in the foaming chambers when the materials are singly filled from the lower side or upper side of the refrigerator.