The invention provides an integrated inductor. The integrated inductor is characterized by comprising a first magnetic core 110, at least two windings 120 and a second magnetic core 130, wherein the first magnetic core is used for forming a magnetic core of a common-mode inductor; the at least two windings 120 are wound around the first magnetic core 110; intervals are formed between any two windings of the at least two windings 120; common-mode inductance is formed between the first magnetic core 110 and each winding of the at least two windings 120; the second magnetic core 130 is not wound with winding; a closed magnetic core is formed between the second magnetic core 130 and the region of the at least two windings 120 wound on the first magnetic core 110; and difference mode inductance is formed between the second magnetic core 130 and each winding of the at least two windings 120. The first magnetic core 110 and the second magnetic core 130 share one winding, so that the system efficiency of a converter can be improved under the premise of ensuring suppression on the difference mode current and the common mode current.