The invention relates to the field of power facilities and particularly discloses a foot fastener. The foot fastener comprises a left foot fastener and a right foot fastener, wherein each of the left foot fastener and the right foot fastener comprises an arc-shaped rod and a pedal plate; the foot fastener is characterized in that each pedal plate is provided with a shoe which is integrated with the pedal plate; each arc-shaped rod is hinged to one end of a connection rod and the other end of the connection rod is hinged to a hand arc-shaped rod; the hand arc-shaped rod is provided with a handle; the connection rod on the left foot fastener or the right foot fastener is hinged to an arc-shaped guard rod; and a key chain which can be locked on the other connection rod and is provided with a spring sheet is arranged at the free end of the arc-shaped guard rod. The connection rod is of a retractable structure. The arc-shaped guard rod is of the retractable structure. The arc-shaped guard rod is provided with a supporting plate, and a soft matter covers the supporting plate. Anti-sliding burrs are arranged on the inner sides of the arc-shaped rod and the hand arc-shaped rod. The foot fastener has high safety coefficient, and labor is saved when the foot fastener is used for climbing an electric pole.