Double-threaded lifting transfer trolley

The utility model provides a double-threaded lifting transfer trolley. The double-threaded lifting transfer trolley comprises a base plate, wheels installed below the base plate, and a tray used for placing objects. The transfer trolley is further provided with a lifting device used for supporting the tray. The lifting device is divided into two lifting assemblies, a middle connection assembly, a drive assembly, an upper installation rack and a lower imitation rack, wherein the two lifting assemblies are the same in structure and arranged horizontally and side by side, and the upper installation rack and the lower installation rack are used for fixing the lifting assemblies. The wheels are wear-resisting wheels with a self-locking function. An adjusting threaded rod is driven by rotating of a rotary table, right-hand and left-hand threads respectively drive two transverse drive connecting rods, with the parallelogram theory, upper connection rods and lower connection rods of the left lifting assembly and the