The invention discloses an automatic gas-liquid separation and backflow integrated device. The integrated device comprises a shell, a helical tube, a separation sieve, a draft tube, a floating ball, a floating ball connecting tube and a ball check valve, wherein the helical tube is mounted on the shell; both ends of the helical tube extend out of the shell, one end is used as an inlet of the gas-liquid separation device, and the other end is used as an outlet of the gas-liquid separation device; the separation sieve is arranged inside the shell and sleeved outside the spiral tube; the draft tube is led out from the lower end of the shell, one end of the draft tube is located inside the shell, and the other end of the draft tube is connected to a stripping pump inlet through the ball check valve; the floating ball is arranged inside the shell and located above the draft tube; the floating ball connecting tube is fixed to the lower end of the floating ball and sleeved to the draft tube. The gas-liquid separation and backflow integrated device has the advantages that in addition to the gas-liquid separation function, the device also integrates automatic on-off backflow function; when the device is used for an oil discharge system, the two segments of work of oil discharge and stripping can be accomplished with one stripping pump; compared with the traditional way of adopting two pumps for respectively accomplishing the two segments of work, the system and operational process are both simplified.