Bozhong A Oilfield is the first igneous oil field in Bohai Sea. Igneous formation has developed fractures and low bearing capacity, which is easy to cause downhole leakage. As a result, the cement slurry cannot return to the wellhead during φ244.5mm casing cementing, resulting in free section casing. As the oil and gas is extracted, the wellhead temperature begins to increase. Wellhead lift occurs when the free casing elongation is sufficient to overcome the sum of the wellhead device weight and the prestress of the casing slips. By analyzing the causes of wellhead lifting, changing the performance of cement slurry and applying casing prestress in the drilling stage, the wellhead lifting problem in the ground pressure formation is effectively solved. The effective solution of wellhead uplift in this oilfield provides a certain technical reference for the subsequent treatment of wellhead uplift.