The invention discloses an orange active dye compound, and a preparation method and an application thereof. The structure of the orange active dye compound is represented by a formula (I). The preparation method comprises the following steps: a compound represented by a formula (II) and a compound represented by a formula (IV) are respectively subjected to hydrochloric acid diazotization; the diazonium salt of the compound represented by the formula (II) is coupled with a compound represented by a formula (III); obtained acid coupled liquid is subjected with the diazonium salt of the compound represented by the formula (IV), such that the orange active dye compound represented by the formula (I) is obtained. The orange active dye compound can be used for preparing an active orange dye. The color fastness and especially light fastness is excellent. The dye is suitable to be used in dyeing of cellulose fiber and especially cotton fiber.