Abstract: Extrusion processing with mixed grain powder as raw materials and with the expanded powder as the wall-material, the beta carotene was used as core material to make the micro-capsule solid beverage by the spray drying technique.The results showed that, the optimal technological conditions for the solid beverage of grain microcapsule was the emulsifying temperature60 ℃, the homogenization pressure 45 MPa, the spray drying inlet air temperature 180 ℃ and the feed rate 50 mL/min.Under these conditions, the microencapsulation yield was 86.51%, the median particle size of the product was 1.315 μm, the average size was 1.77 μm, the average diameter of the product was 1.28 μm.The nutrition cereal solid beverage had better solubility and high nutritional value.