The invention discloses a loose material drying device with insufficient drying and high energy utilization ratio. The device comprises a frame, wherein the frame is provided with a cylindrical charging barrel capable of rotating along the axial direction of the frame; one end of the charging barrel is provided with a material inlet; a bracket is arranged on the frame; one end of the bracket is extended into the charging barrel through the material inlet; a lamp box capable of emitting light and heating a material is arranged on the bracket positioned in the charging barrel; a fan is also arranged on the frame; an air suction pipe is connected on the fan; and the other end of the air suction pipe is positioned in the charging barrel. The drying device has the advantages of high drying efficiency and low energy consumption.