The invention relates to a water-absorbing-performance-good short sleeve shirt with a cap. The water-absorbing-performance-good short sleeve shirt comprises a short sleeve shirt body (1) and is characterized in that the cap (2) is arranged behind a collar of the short sleeve shirt body (1), the cap is provided with a double-layer structure, the inner layer of the cap (2) is a mesh-shaped single-face knitted fabric, the outer layer of the cap is artificial leather, the short sleeve shirt body (1) is made of fabric which comprises warp yarn and weft yarn, the warp yarn spans the weft yarn, looped piles are formed in an interweaving mode, and at least two pieces of weft yarn are arranged at intervals between looped piles formed by the warp yarn. According to the short sleeve shirt, the cap is arranged behind the collar of the short sleeve shirt, sun shading and rain shielding are convenient, and decorating attractiveness is great. The short sleeve shirt has the advantages of being light in weight, good in water-absorbing performance, soft and good in hand feeling, and anti-laddering performance is achieved.