The invention discloses a bathroom mobile phone containing box capable of preventing neglected taking. A through hole is formed in the upper side of a box body, two through holes are formed in the upper portion and the lower portion of a baffle respectively, and the baffle is fixedly connected to the right side position of the box body. A spring bolt hole is formed in the left side of the box body, a shaft sleeve is located on a backboard of the box body, and a through hole is formed in the front side of the box body. Two round rods serve as guide rods, the left end faces of the guide rods are connected to a left vertical plate, a right vertical plate is located at the right of the left vertical plate, and the two guide rods penetrate through the right vertical plate and are connected with the baffle. The guide rods are sleeved with push springs, the left ends of the push springs are tightly attached to the right vertical plate, and check heads are located at the upper end of the right vertical plate. A spring bolt penetrates through the spring bolt hole, and the guide rods penetrate through the through holes in the baffle. A rotary knob is connected to the front end of a rotating shaft, and a lug is connected to the rotating shaft. The rotating shaft penetrates through the through hole of the box body and is inserted into the shaft sleeve hole. A through hole is formed in the bottom of the box body of the containing box, the lower end of a bolt is in a wedged shape, and the upper face of the bolt is connected with a movable plate. The push springs are arranged below the movable plate, and the bolt penetrates through the bottom hole in the containing box. The bathroom mobile phone containing box capable of preventing neglected taking is reasonable, reliable and practical in theory, convenient and safe to use, and simple and practical in structure, and the using way of a door lock is similar to that of an existing door lock.