A packaging material as a formed integral includes a lower plate, a first side plate connected to a first side of the lower plate, and a second side plate connected to a second side of the lower plate. The first side plate includes a first plate body, a first bending line formed on the first plate body and for connecting the first side, and a first assembly portion disposed at one side of the first plate body. The second side plate includes a second plate body, a second bending line disposed at one side of the second plate body, and a first connecting portion disposed at one side of the second plate body. The first plate body and the second plate body are bent towards the lower plate, and the first assembly portion is locked and fastened with the first connecting portion to complete the packaging material.