Abstract: Flaxseed oil was microencapsulated with the spray drying method using flaxseed gum as wall material. The effect factors of preparing flaxseed oil microcapsule had been investigated in detail according to microencapsulation efficiency and the ratio of oil content. The results showed that the optimal spray drying processing conditions were determined as follows, the air temperature at the inlet was 170 ℃, and at the exit was 70 ℃, the rotating speed of centrifugal atomizer was 24000r/min, and liquid feed rate was 50.41mL/min. The content of microencapsulation efficiency was 95.32% and the ratio of oil content was 59.48%.