The utility model discloses a prefabricated stick of symmetry pore structure stress type polarization maintaining fiber, this prefabrication stick include the center for the symmetry of the symmetrical pore structure in excellent core district female stick that punches, still contain the packing stress stick of independent prefabrication, the centre of a circle apart from D31 is an element of a set [ 4mm, the 25mm ] of the diameter D1 is an element of a set [ 1mm, 8mm ] of the prefabricated excellent core of symmetry pore structure, the diameter D2 is an element of a set [ 30mm, 60mm ] of female stick, quantity n3 is an element of a set [ 2, 12 ] in symmetrical hole, the diameter D3 is an element of a set [ 6mm, 20mm ] in symmetrical hole, symmetrical hole and the prefabricated excellent core of symmetrical pore structure. Fill the stress stick according to the designing requirement, non - symmetry is completely inserted the symmetry and is punched in the symmetrical hole of female stick, forms the prefabricated excellent structural design of nimble changeable stress type polarization maintaining fiber.