A device and method for quickly adjusting a vehicle glass water nozzle, comprising a nozzle direction adjusting body (101); a position control assembly (102), comprising a first position control subassembly, a second position control subassembly, and a subassembly driving mechanism; and an adjusting element (302), one end of the adjusting element (302) being able to be connected to a nozzle opening (301) of the nozzle (103) and to drive the nozzle opening (301) of the nozzle (103) to adjust a direction. The method comprises the following steps : matching a concave surface of the nozzle direction adjusting body (101) with the nozzle (103); adjusting positions of the first position control subassembly and/or the second position control subassembly to change the positions of edge intersection point points of the first position control subassembly and the second position control subassembly; and connecting one end of the adjusting element (302) to the nozzle opening (301) of the nozzle (103), and positioning the adjusting element (302) at the edge intersection point points of the first position control subassembly and the second position control subassembly, until the direction of the nozzle opening (301) of the nozzle (103) is appropriate.