The utility model provides a cross anti -pollution well -flushing technology tubular column of oil reservoir, tubular column in the two lock joint heads of slidingtype, seat seal well -flushing outer tube column and oil pumping, the two lock joint heads of slidingtype include that a nipple and slip cap establish overcoat cap on the nipple, upper end that sit to seal well -flushing outer tube column connect in on the overcoat cap, in the oil pumping tubular column set up in in sit sealing well -flushing outer tube column's inner chamber, its upper end with the lower extreme of nipple is connected. The utility model discloses a cross the anti -pollution well -flushing tubular column of oil reservoir, can sit the operation of sealing and pump in the stripper well, realize anti -pollution well -flushing, overcome prior art's defect.