The invention relates to composite yellow reactive dye for wool. The composite yellow reactive dye for wool is a mixture which is compounded by a component A and a component B according to any proportion; the component A is selected from the general constitutional formula (1) as follows; the component B is selected from the general constitutional formula (2) as follows; X expresses -F or -Cl; Y1 and Y2 respectively and independently express -CH=CH2 or -CH2CH2OSO3M; M expresses hydrogen or alkali metal. The yellow reactive dye for wool is the composite type yellow reactive dye for wool which is suitable for dyeing and printing wool fiber, and has the advantages of brilliant color, application convenience, good level-dyeing property and excellent fastness; the yellow reactive dye for wool is especially suitable for dyeing shrinkproof and super washing-resisting wool.