Abstract:Seismic migration technique has became ari important means far analysing all complicated suhsurface geological structures. However,the technique is not always serviceable to bring us instint result. It sometimes even causes some unbelievable phenomena. On the basis of his fang practice arid reading same migration literature,the author expounds haw to produce a satisfactory migrated seismic section. The authar lists arid analyses five major factors involved in migration,namely strategy,algarithm,parameters,inputted data and velocity. Same applicable criteria arid matters needing attention are put forward iri the article. Mastering of these knowledge is surely helpful to bath seismic data processing arid migrated seismic data iriterpretion