The utility model discloses a spherical hinge type positioning device of a railway contact network. The spherical hinge type positioning device comprises a positioning support, a connecting rod, a spherical hinge seat and a cylinder, the positioning support is of a rod body structure with a corner, a hoop piece is arranged at the upper end of the positioning support, a support connecting block isarranged at the lower end of the positioning support, and the support connecting block is fixedly connected with the spherical hinge base. One end of the connecting rod is connected with the end of the spherical hinge seat through a spherical hinge pair structure, the other end of the connecting rod is fixedly connected with the cylinder, and a contact wire clamp is arranged at the end of the cylinder. The positioning device can meet the arrangement requirement of the mountain climbing railway contact net with a steep line and a large gradient change rate, the deflection requirement of the positioner is met, and parts are prevented from being damaged.