The utility model relates to an elevator car multimedia installation supporting structure which comprises an inclined lintel frame, and the inclined lintel frame is respectively connected with a car roof of an elevator car and an upper front wall of the car. The inclined lintel frame comprises an upper end area, a middle supporting area and a lower end area. wherein at least two mounting holes arehorizontally formed in the upper end area, the upper end area is connected with a car roof of an elevator car, the middle supporting area is used for fixedly mounting a multimedia display unit, at least two mounting holes are horizontally formed in the lower end area, and the lower end area is connected with the upper front wall of the car; the mounting holes are composed of circular holes and long kidney-shaped holes. The device has the advantages of being convenient to install and convenient and simple to install and detach during follow-up maintenance.