This application relates to the field of automation technologies, and specifically discloses a self-moving device, a method for adjusting a movement trajectory, and a computer readable storage medium. The device includes a body, an image acquisition module, and a control circuit. The image acquisition module acquires an image in a traveling direction of the body. The control circuit fits, according to the image, a boundary corresponding to a working region in which the self-moving device is located. When the body moves toward the boundary and the body and the boundary meet a preset distance relationship, an angle relationship between the traveling direction of the body and the boundary is recognized according to the image, and the body is controlled to steer. When the steering starts, an acute angle or a right angle is formed between a reference line of the traveling direction of the body and a first boundary portion. When the steering is completed, an acute angle or a right angle is formed between the reference line of the traveling direction of the body and a second boundary portion. An intersection of the reference line of the traveling direction of the body and the boundary divides the boundary into the first boundary portion and the second boundary portion. The appropriateness of path planning is improved, to improve the movement and working efficiency of the self-moving device.