The invention discloses a multifunctional sweater. The multifunctional sweater comprises a lower sweater body woven by fine knitted yarn, a sweater neckline, sweater sleeves and an upper sweater bodywoven by fine knitted yarn and rough knitted yarn. The multifunctional sweater is characterized in that the fine kitted yarn is composed of core spun yarn a1 and a wrapping layer a2, and the rough knitted yarn is composed of inner-layer core spun yarn b1, a middle coating layer b2 and an outermost color-developing layer b3. The core spun yarn a1 includes a phase change energy storage material, theinner-layer core spun yarn b1 includes graphene compound fibers, and the outermost color-developing layer b3 includes luminescent fibers. The multifunctional sweater has good effects of heat preservation, radiation resistance, static electricity resistance and far-infrared resistance, the temperature of the sweater can also be adjusted, and the multifunctional sweater is suitable for environmental change.