Abstract: A multi-purpose desk lamp capable of adjusting illumination position, comprising a base, a support column connected to the base, a luminous lampshade, a light emitting component inside the luminous lampshade, a pivot structure between the luminous lampshade and the support column, and an open slot on the top surface of the luminous lampshade at a position close to one end. The luminous lampshade can be connected with the pivot structure in a movable manner via a positioning bolt through the open slot. A telescopic sliding structure is provided inside the luminous lampshade. The luminous lampshade can move linearly along the open slot via the telescopic sliding structure or can be tilted upward or downward via the pivot structure, and the positioning bolt can be turned left or right in relation to the pivot structure, to change the illumination position of the luminous lampshade.