Anti-falling device for drilling wellhead

The utility model relates to an object falling prevention device for a well drilling wellhead. According to the technical scheme, a sealing ring is arranged on the inner wall of a well mouth connector, the upper portion of a well mouth is sleeved with the sealing ring, the well mouth connector and the well mouth are fixed through a fixing bolt, and vertical adjustment of the well mouth connector can be achieved; a guiding head is arranged at the top of the well mouth connector, a magnet cover is arranged above the guiding head, a magnet is installed in the magnet cover, and the magnet is connected with a magnetizing machine and a demagnetizing machine. The wellhead connector has the advantages that the wellhead connector is simple in structure, safe, reliable and convenient to use, the height of the wellhead connector can be adjusted at any time, the height of a wellhead can be changed without frequent cutting or welding, a guide opening does not need to be cut again, labor intensity is relieved, the magnet g