The invention discloses a method for preparing aminoquinoline derivatives (I) and (II), and belongs to the field of organic chemistry. Substituted quinoline oxide (or isoquinoline oxide) and tertiary amine (or secondary amine) are taken as raw materials, in the presence of phosphite and carbon tetrachloride, to prepare the aminoquinoline derivatives (I) and (II). The raw materials are cheap and are easy to obtain; the reaction condition is mild; the operation is simple; the synthetic yield is high; and the method is beneficial for industrial production. The derivatives have potential application to the fields of chemistry and medicine. The invention provides a novel way for compounding the aminoquinoline derivatives.