The invention relates to a lift car air purification device. The lift car air purification device comprises a purification box arranged on the top of a lift car, wherein one side of the purification box is connected to an air inlet pipe communicating with the exterior of the lift car; an air outlet pipe is arranged at the other side of the purification box and communicates with an air outlet of the lift car; filter screens are arranged at connecting openings between the purification box and the air inlet pipe and between the purification box and the air outlet pipe; a filtration area and a purification area are arranged in the purification box in sequence; an air guide channel and a dust collection area communicating with the air guide channel are arranged in the filtration area; one end of the air guide channel communicates with the air inlet pipe, and the other end of the air guide channel communicates with the purification area; baffle plates are arranged in the purification area insequence in an up and down staggering manner, and a double-layer plate is arranged at an outlet of the purification area; the baffle plates are internally filled with adsorbent materials; the double-layer plate is internally filled with a drying material; and an outlet of the purification area communicates with the air outlet pipe. The lift car air purification device can enhance the air purification effect and can clean and purify air in the lift car very well, thus enabling the air in the lift car to have good quality and people taking a lift to feel comfortable and facilitating the physical and psychological health of people.