The invention relates to a carbon-dioxide flooding dual-gas and dual-liquid separating and oil transferring technology. The problems that in the prior art, delivering, separating and transferring of fluid exploited from a carbon-dioxide flooding oil well with the high carbon dioxide content, the high gas-oil ratio and even intermittently-generated associated gas slug injection are difficult are mainly solved. The carbon-dioxide flooding dual-gas and dual-liquid separating and oil transferring technology is characterized in that a liquid-phase outlet pipe of a gas-liquid separator is connected with an A-type separating, settling and heating buffering device, and an aqueous-phase outlet of the A-type separating, settling and heating buffering device is connected with a B-type separating, settling and heating buffering device; an aqueous-phase outlet pipe of the B-type separating, settling and heating buffering device is connected with a water mixing pump; and a tank-top gas-phase outlet pipe of the gas-liquid separator, a tank-top gas-phase outlet pipe of the A-type separating, settling and heating buffering device and a tank-top gas-phase outlet pipe of the B-type separating, settling and heating buffering device are connected with a natural gas drying and oil removing device, and a tank-top gas-phase outlet pipe of the natural gas drying and oil removing device is connected with a natural gas processing station. The carbon-dioxide flooding dual-gas and dual-liquid separating and oil transferring technology is suitable for closed delivering, separating and transferring of the fluid exploited out from the oil-field carbon dioxide injection oil-flooding oil well, and the investment cost is greatly reduced.