The invention discloses an underwater carrying bag for a mobile phone. The carrying bag comprises a carrying clamp and a sealing bag body and is characterized in that a hair comb is arranged on the carrying clamp, the carrying clamp is clamped to an opening of the sealing bag body, a sealing device is arranged nearby the opening of the sealing bag body, and a water inlet reminding mark is arrangedbetween the sealing device and the carrying clamp. According to the underwater carrying bag for the mobile phone, the hair comb and the waterproof bag for the mobile phone can be ingeniously combinedto form the carrying clamp of the waterproof bag with the hair comb, the carrying bag has the functions of water leakage prevention through dual-layer protection and water leakage warning, water leakage is discovered in time, and accordingly the mobile phone of a user is protected.