A liquid storing type air-liquid separator in front of a compressor of a refrigerant pipeline comprises a horizontal barrel, a front cover, a rear cover, an air outlet pipe and liquid observing devices, wherein the horizontal barrel is a circular iron barrel which is horizontally positioned; an inlet pipe is a straight pipe which is provided with an inclined notch; the front cover is formed by welding an arc-shaped spherical plate and a cylindrical housing; the rear cover is a circular plate; the air outlet pipe is a pipe of which two ends are straight pipes, and the middle of the air outlet pipe is bent in a smooth transition manner; the liquid observing devices are liquid level meters; observing pipes are manufactured through transparent PVC and are sealed through butadiene-acrylonitrilerubber gaskets and screwed and fixed through threaded covers. According to the liquid storing type air-liquid separator in front of the compressor of the refrigerant pipeline, the inlet pipe is arranged and capable of enabling a refrigerant entering the horizontal barrel to be far away from the air outlet pipe, and thus the air-liquid separating distance can be increased; liquid and air in the refrigerant can be quickly dispersed through the inlet pipe of which the end is provided with the inclined notch, so that the air-liquid separating speed is increased.