The invention relates to an adjustable temperature-reducing system in a textile workshop. The adjustable temperature-reducing system is characterized by comprising a first water conditioner (1), a second water conditioner (2), a first workshop (3) and a second workshop (4), wherein a first air inlet pipeline (5) is connected between the first water conditioner (1) and the first workshop (3); a second air inlet pipeline (6) is connected between the second water conditioner (2) and the second workshop (4); a first valve (8) is arranged at the rear section of the first air inlet pipeline (5); a second valve (9) is arranged at the rear section of the second air inlet pipeline (6); a third air inlet pipeline (7) is connected between the middle section of the first air inlet pipeline (5) and the middle section of the second air inlet pipeline (6); and the third air inlet pipeline (7) is provided with a third valve (10). The adjustable temperature-reducing system has the advantages that due to adoption of the water conditioner, the cost is reduced, and the temperature-reducing effect is better; and due to arrangement of the plurality of valves, the temperature-adjustable effect is better.