The invention discloses a backlight source box staff and belongs to the technical field of mapping equipment. According to the technical scheme, the backlight source box staff comprises an outer staff, an inner staff is sleeved with the outer staff, and the inner staff is formed by connecting three staff bodies which are different in cross section and are provided with backlight sources in a sleeving mode. The box staff is characterized by comprising a power feed circuit and a micro switch circuit which are arranged in a power switch loop inside the outer staff and the inner staff. The box staff has the advantages that the box staff can be switched on and switched off automatically, the box staff is convenient for construction personnel to control, and electric energy is saved; the self-locking or interlocking micro switch circuit is used for switching off and switching on a power supply circuit between two adjacent staff bodies, and therefore the backlight source of an observed staff body is in luminance; the power management can be conducted automatically, excessive power consumption is prevented, and the vertical state of the staff bodies can be displayed automatically.