Tectonic stress is a major factor of migration and accumulation of oil and gas. It forms the migration channel and accumulation trop of oil and gas, and controls the migration direction and distribution of oil and gas by the migration potential field. Analyses the research development of tectonic stress field, summaries its research methods and constants, discusses mainly the method of determining tectonic stress field in oil and gas basin, and approaches the relation between tectonic stress field and the migration and accumulation of oil and gas.