This invention is relevant to a bed cover of pickup truck. The bed cover of pickup truck includes one bed cover. The bed cover includes at least two plates. The adjacent plates are connected by rotating shaft structure. The rotating shaft structure includes a plate-like pedestal, two connectors which form a rotary connection with the pedestal. This invention provides a bed cover of pickup truck with simple structure and great leading function. The drainage channel in the invention are big and will not cause syphonage. Thus the leading function will be better, requirement of the assembly accuracy will be lower and the production will be easier.