Abstract: This study analysised plasma fatty acids composition of 81 healthy normal pregnant women and selected the food factors related to plasma DHA level with pregnant women situation investigation tables.The findings showed that plasma DHA content of pregnant women was 1.806% of total fatty acids,TN3/TN6 was 0.127,DHA/AA was 0.353,DHA/TN6 was 0.056;The factors ralated to plasma DHA level were eating more animal foods,more fish and DHA supplemention.