Power steering oil tank with controllable liquid level

The invention relates to the technical field of automobile steering, in particular to a liquid-level-controllable power steering oil tank which comprises a tank body used for storing oil, and an insert hole is formed in the top of the tank body; the tank cover is detachably connected with the top of the tank body, and the tank cover can block the plug-in hole; the insertion piece is detachably connected into the insertion piece hole; wherein the insertion piece comprises a sealing cover connected in the insertion piece hole in a sleeved mode, an adjusting cavity is formed in the sealing cover along the axis, a partition plate is arranged in the sealing cover, and the oil and gas flow dividing operation can be achieved through cooperation of a plugging head in the exhaust column, the first hole and the second hole. Oil liquid in steam can be adsorbed through the purification cotton block, and in other words, adsorption and purification operation can be carried out in advance. And when the steam flow flows, the