A mailbox with lighting decorative structure, on an upper face or side face of the mailbox is installed with a lighting fixing structure of a different shape. The lighting fixing structure of different shape is installed with a specified number of lighting boards with different letter fonts or patterns. The lighting board is a combination of plastic optical fibers with letter fonts or patterns or different structures. The lighting fixing structure is connected with a circuit board, a solar energy board and a battery, producing lighting effects to the letter fonts or patterns on the mailbox at nighttime or on cloudy days.