Four bifunctional reactive dyes containing the monochlorotriazinyl and the phosphoric acid group as two different reactive systems were synthesized by in situ and continuous method for the purpose of development of new reactive dyes. These dyes were applied on the cellul-osic fibers by two method, exhaustion and thermosol. The synthetic yield of these dyes was 78-84%. And dyeings obtained by two method showed good shade of colour and their fastness properties were all within commercially acceptable limits.