The invention relates to a quick changing structure of vacuum suction nozzles. The quick changing structure comprises a connecting block, a supporting block mounted under the connecting block, and a limiting assembly which penetrates through the supporting block, wherein one end of the limiting assembly is connected with the supporting block in a clamping manner; the other end of the limiting assembly is connected with a mounting plate; the mounting plate is arranged under the supporting block; a sucking disc assembly is connected under the mounting plate; the suction nozzles are arranged at the bottom end of the sucking disc assembly; and air pipe connectors are arranged on the side wall of the mounting plate. According to the quick changing structure of the vacuum suction nozzles, the sucking disc assembly and the limiting assembly are arranged, a sucking disc structure can be quickly separated through a magnet, the quick changing structure has relatively small pressing force through a self-made sealing ring, air leakage is avoided during the process, erecting cost of the mechanism and time cost of wire changing are reduced, the changing manner is easy and simple, the air circuit wiring problem is solved, and adaptability is high.