The invention relates to a multi-turn valve for controlling fluid media and belongs to the field of fluid control valves. A driving plate capable of rotating along with a valve rod is arranged. Threaded grooves are formed in the driving plate at equal intervals. The number of active turns of each threaded groove depends on the number of opening turns of the valve. An inner hole of the driving plate is matched with the valve rod. The lower end of a cylinder step-shaped pointer is a cylinder adapting to the width of each threaded groove in the driving plate, and is installed in one threaded groove; the upper end of the cylinder step-shaped pointer is a cylinder of a smaller diameter, and used for pointing the number of opening or closing turns; the middle section of the cylinder step-shaped pointer is a cylinder of a proper diameter, is 1.5 mm long and is clamped between the driving plate and a display plate and used for limiting the axial displacement of the pointer. The display plate is arranged on a driving plate base. A straight groove is machined in the display plate in the radial direction and used for containing the pointer and limiting the pointer from moving. Scale marks are marked on the two sides of the straight groove. The distance between the scale marks is twice the screw pitch of each threaded groove. Figures are marked corresponding to the positions of the scale marks.