A packaging box for liquid crystal display (LCD) panel components includes a body. A sidewall of the body is configured with a neck. The packaging box further includes clamping pieces. Each of the clamping pieces comprises a first arm, a second arm, and a connecting structure that connects the first area to the second arm. The first arm is inserted into the neck. The second arm is inserted into a gap formed by separation of the LCD panel and the circuit board by a flexible circuit board. The LCD panel is in a completely fixed position in a horizontal direction.