A built-in refrigerator, configured to be supported on a supporting surface, wherein the built-in refrigerator comprises a cabinet, feet, a door movably disposed at a front side of the cabinet, a compressor compartment formed in a rear lower portion of the refrigerator and a compressor and a heat dissipating fan located in the compressor compartment, wherein the cabinet comprises a bottom plate, a left side plate at a left end of the compressor compartment, a right side plate at a right end of the compressor compartment, and two secondary air ports, wherein the lower ends of the feet project downward out of the bottom plate, when the refrigerator is supported on the supporting surface by using the feet, such that the bottom plate is disposed apart from the supporting surface, and the bottom plate comprises a compressor compartment bottom plate located below the compressor compartment, the compressor compartment bottom plate being formed with a main air inlet and a main air outlet communicating the environment with the compressor compartment, the two secondary air ports are formed on the left side plate and the right side plate respectively and communicate the environment with the compressor compartment, air from the environment, driven by the heat dissipating fan, enters the compressor compartment through the main air inlet and one of the secondary air ports, and then flowing to the environment through the main air outlet and the other of the secondary air ports, the built-in refrigerator further comprises a partition plate extending downward from the bottom plate and located between the main air inlet and the main air outlet, and a wind baffle extending downward out of the bottom plate, the partition plate extends in a front-rear direction, the compressor compartment bottom plate comprises a left end portion on a left side of the partition plate and a right end portion on a right side of the partition plate, the main air inlet is formed on one of the left end portion and the right end portion, and the main air outlet is formed on the other of the left end portion and the right end portion, the wind baffle is connected to the partition plate and located behind the main air outlet, when the refrigerator is supported on the supporting surface, both of the partition plate and the wind baffle abut against the supporting surface. wherein the cabinet comprises a bottom plate, a left side plate at a left end of the compressor compartment, a right side plate at a right end of the compressor compartment, and two secondary air ports, wherein the lower ends of the feet project downward out of the bottom plate, when the refrigerator is supported on the supporting surface by using the feet, such that the bottom plate is disposed apart from the supporting surface, and the bottom plate comprises a compressor compartment bottom plate located below the compressor compartment, the compressor compartment bottom plate being formed with a main air inlet and a main air outlet communicating the environment with the compressor compartment, the two secondary air ports are formed on the left side plate and the right side plate respectively and communicate the environment with the compressor compartment, air from the environment, driven by the heat dissipating fan, enters the compressor compartment through the main air inlet and one of the secondary air ports, and then flowing to the environment through the main air outlet and the other of the secondary air ports, the built-in refrigerator further comprises a partition plate extending downward from the bottom plate and located between the main air inlet and the main air outlet, and a wind baffle extending downward out of the bottom plate, the partition plate extends in a front-rear direction, the compressor compartment bottom plate comprises a left end portion on a left side of the partition plate and a right end portion on a right side of the partition plate, the main air inlet is formed on one of the left end portion and the right end portion, and the main air outlet is formed on the other of the left end portion and the right end portion, the wind baffle is connected to the partition plate and located behind the main air outlet, when the refrigerator is supported on the supporting surface, both of the partition plate and the wind baffle abut against the supporting surface.