The invention relates to a garment for old people and a preparation technology of a fabric adopted by the garment. With the garment, the old people can conveniently check the time but can not feel painful, therefore, great convenience and comfort are brought to the old people, and when a clock is not needed, sleeves can be detached, and the garment is worn as a short-sleeve shirt. After wearing the garment, a presbyopia patient can hang presbyopic glasses on the garment and does not need to carry a spectacle case, and therefore, the presbyopia patient can conveniently read the literal information or sign the name and write letters. The prepared pleating fabric is in a double-layer structure, so that the third dimension and layering sense of folds on the surface layer are enhanced, and the pleating structure is stable and plump; a production method of the pleating fabric is simple, and is high in efficiency and low in cost; meanwhile, a water absorption testing method is simple and practical, a testing result is rapid and timely, with the adoption of the method for the water absorption testing, the testing can be completed within a short time, and therefore, the checking on the production and the technology of a water-absorbing fabric by the enterprises is benefited; the testing cost is low, and with the adoption of the method for carrying out testing, a special testing device does not need to be arranged.