The invention relates to a reasonable-structure travel suit for the aged and a method for smoothness finishing and water absorption performance testing of the suit. Time can be conveniently checked, no pains can be felt, great convenience and comfort feeling are brought, and sleeves can be removed when a watch is not used so that the suit can be worn as a T-shirt. When the suit is used, a presbyopia patient can hang presbyopic glasses on the suit without carrying a glasses case and can conveniently watch written materials or sign a name. A lining layer is arranged on the back side of the suit body, the lining layer is formed by interweaving warp and weft, protein fiber is adopted as the warp, acrylic fiber is adopted as the weft, the protein fiber has the diameter of 42.1 microns and the fineness of 189 dtex, the acrylic fiber has the diameter of 6.25 microns and the fineness of 189 dtex, the warp density is 54.8 pieces per centimeter, and the weft density is 54.1 pieces per centimeter. The weft backed weave structure is adopted. The suit is reasonable in structure.