The poor cementing quality occurred in some high pressure salt-gypsum layer of Missan oilfield is analyzed together with the influence on the next operation are analyzed, the design of preflush and cement slurry, on-site inspection of casing and liner, borehole requirements before casing running, borehole requirements before cementing, casing eccentricity, cementing by mud grouting & displacing and cementing quality checking are successfully applied in the high pressure salt-gypsum sections of 47 well, which provides a reference for the cementing quality improvement in similar situation.