The utility model relates to a valve stem connecting mechanism of a multitandem valve, which is characterized in that holes on a rocker are long holes or arc long holes extending along the axes direction of two rotational pins, wherein the holes are matched with the rotational pins; when applying force to the rocker, the connecting mechanism pulls a valve stem on the multitandem valve to move up and down by using the rotational pins as transmission medium and using a connecting support as a pivot, and realizes the operation of the multitandem valve. The utility model has the advantages that the structure is simple and durable, the manufacture is easy, and the driver operates and controls the handle freely and easily when in work, thereby causing the human engineering work of a land scraper to be more humanized.