The invention provides an anti-climbing device for electric pole stay wires. The anti-climbing device is arranged on the stay wires and comprises a frame body, a positioning device, a baffle device, a connection line device, a fixing device, an abutting device and a removing device. A first bent rod, a first spring, a first abutting rod, a first idler wheel, fixing teeth and a first positioning rod are arranged on the frame body. The positioning device comprises a positioning frame, a positioning ring, a first oblique rod and a positioning rack. The baffle device comprises an oblique plate, a transverse plate, a first connecting rod and a vertical plate. The connection line device comprises a first connection line and a second connection line. The fixing device comprises a fixing block, a first support, a first fixing rod, a second fixing rod, a second abutting rod, a holding rod and a positioning block. The removing device comprises a supporting block, a second spring, a third spring, a scraping plate and a scraping block. The abutting device comprises a first abutting plate, a fourth spring, a second bent rod and a second abutting plate. By the adoption of the anti-climbing device, the stay wires can be well protected, and the probability of short circuits and tripping caused when plants and small animals climb the stay wires is lowered.