An integrated radiator assembly, comprising: multiple groups of refrigerant flat tubes, wherein multiple refrigerant flow channels are disposed in each group of the refrigerant flat tubes; a refrigerant collection tube, disposed at two ends of the multiple groups of refrigerant flat tubes and in communication with each of the refrigerant flow channels; multiple groups of cooling liquid flat tubes, wherein each of the refrigerant flat tubes is externally sleeved with each of the cooling liquid flat tubes, and multiple cooling liquid flow channels are formed between an outer surface of the cooling liquid flat tube and an outer surface of the refrigerant flat tube; and a cooling liquid collection tube, disposed at two ends of the multiple groups of cooling liquid flat tubes and in communication with each of the cooling liquid flow channels, wherein the cooling liquid collection tube is separated from the refrigerant collection tube, so that a refrigerant circulates in the refrigerant flat tubes and the refrigerant collection tube and cooling liquid flows in the cooling liquid flat tubes and the cooling liquid collection tube, further comprising: an air fin, disposed between adjacent cooling liquid flat tubes, characterized in that the refrigerant collection tube and the cooling liquid collection tube are integrated in a same side liquid collection tube, wherein the side liquid collection tube is formed by stamping and then welding an aluminum plate, wherein a separation layer is disposed inside the side liquid collection tube, and the separation layer separates the side liquid collection tube into a first cavity serving as the cooling liquid collection tube and a second cavity serving as the refrigerant collection tube, wherein an end of the cooling liquid flat tube extends into the first cavity, so that cooling liquid in the cooling liquid flow channels is collected to the first cavity, wherein an end of the refrigerant flat tube extends into the second cavity, so that a refrigerant in the refrigerant flow channels is collected to the second cavity. multiple groups of refrigerant flat tubes, wherein multiple refrigerant flow channels are disposed in each group of the refrigerant flat tubes; a refrigerant collection tube, disposed at two ends of the multiple groups of refrigerant flat tubes and in communication with each of the refrigerant flow channels; multiple groups of cooling liquid flat tubes, wherein each of the refrigerant flat tubes is externally sleeved with each of the cooling liquid flat tubes, and multiple cooling liquid flow channels are formed between an outer surface of the cooling liquid flat tube and an outer surface of the refrigerant flat tube; and a cooling liquid collection tube, disposed at two ends of the multiple groups of cooling liquid flat tubes and in communication with each of the cooling liquid flow channels, wherein the cooling liquid collection tube is separated from the refrigerant collection tube, so that a refrigerant circulates in the refrigerant flat tubes and the refrigerant collection tube and cooling liquid flows in the cooling liquid flat tubes and the cooling liquid collection tube, further comprising: an air fin, disposed between adjacent cooling liquid flat tubes, characterized in that the refrigerant collection tube and the cooling liquid collection tube are integrated in a same side liquid collection tube, wherein the side liquid collection tube is formed by stamping and then welding an aluminum plate, wherein a separation layer is disposed inside the side liquid collection tube, and the separation layer separates the side liquid collection tube into a first cavity serving as the cooling liquid collection tube and a second cavity serving as the refrigerant collection tube, wherein an end of the cooling liquid flat tube extends into the first cavity, so that cooling liquid in the cooling liquid flow channels is collected to the first cavity, wherein an end of the refrigerant flat tube extends into the second cavity, so that a refrigerant in the refrigerant flow channels is collected to the second cavity. an air fin, disposed between adjacent cooling liquid flat tubes, characterized in that the refrigerant collection tube and the cooling liquid collection tube are integrated in a same side liquid collection tube, wherein the side liquid collection tube is formed by stamping and then welding an aluminum plate, wherein a separation layer is disposed inside the side liquid collection tube, and the separation layer separates the side liquid collection tube into a first cavity serving as the cooling liquid collection tube and a second cavity serving as the refrigerant collection tube, wherein an end of the cooling liquid flat tube extends into the first cavity, so that cooling liquid in the cooling liquid flow channels is collected to the first cavity, wherein an end of the refrigerant flat tube extends into the second cavity, so that a refrigerant in the refrigerant flow channels is collected to the second cavity.