Abstract: The types and defects of spacers in operation in Shenyang are investigated, and the causes of spacer defects are analyzed.It developes a new type transmission line of spring and hinged spacers and improved in 3 aspects: the hinge structure, fixed coupling plate and spring damping structure, producing a new type of spacer sample.Two representative lines are selected for field test.It observes the operation of a new type transmission line of spring and hinged spacers, and verifies the practical application effect of the new type spring and hinged spacers.It puts forward a new project for anti-dancing of power grid.