A continuous positive airway pressure device comprising a shell having an upper shell body; a lower shell body connected to the upper shell body; an interior space; and an inlet and an outlet both fluidly communicating with the interior space of the shell; a diversion sound-absorbing foam pad disposed in the interior space of the shell and having a bottom board; a first side wall, a second side wall, a third side wall, and a fourth side wall protruding from the bottom board and arranged sequentially; a containing space enclosed by the first side wall, the second side wall, the third side wall, and the fourth side wall; and a blower seat protruding from the bottom board, disposed in the containing space, and having an opening recessed inward on the blower seat, fluidly communicating with the containing space, and disposed near the fourth side wall; and wherein the diversion sound-absorbing foam pad forms an airflow passage, and the airflow passage extends tortuously inside the shell and around the diversion sound-absorbing foam pad, sequentially passes by a top surface of the first side wall, a top surface of the second side wall, two opposite ends of the third side wall, and the fourth side wall, and fluidly communicates with the opening; a blower disposed in the containing space, disposed on the blower seat, and having a blower fluid inlet fluidly communicating with the opening of the blower seat of the diversion sound-absorbing foam pad; and a blower fluid outlet fluidly communicating with the outlet of the shell; and a partition fixed on a top edge of the lower shell body, covering the blower and the diversion sound-absorbing foam pad, and having a leading hole defined through the partition, fluidly communicating with a portion of the airflow passage near the first side wall, and fluidly communicating with the inlet of the shell. a shell having an upper shell body; a lower shell body connected to the upper shell body; an interior space; and an inlet and an outlet both fluidly communicating with the interior space of the shell; an upper shell body; a lower shell body connected to the upper shell body; an interior space; and an inlet and an outlet both fluidly communicating with the interior space of the shell; a diversion sound-absorbing foam pad disposed in the interior space of the shell and having a bottom board; a first side wall, a second side wall, a third side wall, and a fourth side wall protruding from the bottom board and arranged sequentially; a containing space enclosed by the first side wall, the second side wall, the third side wall, and the fourth side wall; and a blower seat protruding from the bottom board, disposed in the containing space, and having an opening recessed inward on the blower seat, fluidly communicating with the containing space, and disposed near the fourth side wall; and wherein the diversion sound-absorbing foam pad forms an airflow passage, and the airflow passage extends tortuously inside the shell and around the diversion sound-absorbing foam pad, sequentially passes by a top surface of the first side wall, a top surface of the second side wall, two opposite ends of the third side wall, and the fourth side wall, and fluidly communicates with the opening; a bottom board; a first side wall, a second side wall, a third side wall, and a fourth side wall protruding from the bottom board and arranged sequentially; a containing space enclosed by the first side wall, the second side wall, the third side wall, and the fourth side wall; and a blower seat protruding from the bottom board, disposed in the containing space, and having an opening recessed inward on the blower seat, fluidly communicating with the containing space, and disposed near the fourth side wall; and wherein the diversion sound-absorbing foam pad forms an airflow passage, and the airflow passage extends tortuously inside the shell and around the diversion sound-absorbing foam pad, sequentially passes by a top surface of the first side wall, a top surface of the second side wall, two opposite ends of the third side wall, and the fourth side wall, and fluidly communicates with the opening; a blower disposed in the containing space, disposed on the blower seat, and having a blower fluid inlet fluidly communicating with the opening of the blower seat of the diversion sound-absorbing foam pad; and a blower fluid outlet fluidly communicating with the outlet of the shell; and a blower fluid inlet fluidly communicating with the opening of the blower seat of the diversion sound-absorbing foam pad; and a blower fluid outlet fluidly communicating with the outlet of the shell; and a partition fixed on a top edge of the lower shell body, covering the blower and the diversion sound-absorbing foam pad, and having a leading hole defined through the partition, fluidly communicating with a portion of the airflow passage near the first side wall, and fluidly communicating with the inlet of the shell.