The invention relates to a work garment and a preparation method of the work garment. According to the work garment, an air bag can be used as a sleeping mat, so that comfort is brought to people. Pockets on the chest comprise an inner pocket and an outer pocket, wherein the outer pocket is used for accommodating an employee's card, the inner pocket is used for accommodating common articles, therefore, the normal use of the pockets is not influenced, thus not only can the employee's card be displayed normally, but also the discomfort caused by hanging of the employee's card on the neck is avoided, so that convenience is brought to employees of the enterprises. A manufactured 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.