Lugou Bridge is an eleven-hole composite arch bridge. The arch hole gradually increases from both banks to the center of the bridge. The arch span ranges from12.35m to13.42m.. The center of the bridge protrudes slightly by 93.5 cm, and the slope is gentle. The river bridge is 213.15m long, with a total length of 266.5m, with approach bridges at both ends. The total width of this bridge is 9.3 meters. The bridge deck is 7.5 meters wide. The bridge deck with wild goose wings on both sides of the bridge is bell-shaped and the entrance is 32 meters wide. Stone fences are set on both sides of the bridge deck, with 140 column in the south and 14 1 column in the north. The spacing between columns is about 1.8m to 2m, and the height of columns is1.4m. The height of stone-embedded fence boards between columns is about 0.85m..
The whole bridge is a stone structure, and the key parts are connected by silver ingots and iron tenons. It is the longest ancient stone bridge in northern China. It was described as a magnificent stone bridge in The Travels of Marco Polo, and later foreigners called it "Kelpolo Bridge" [1]. 1on July 7, 937, Japanese imperialism launched a full-scale war of aggression against China here. The defenders of China, the ancient city of Wanping, rose up to resist, which was called "Lugouqiao Incident" (also known as "July 7th Incident"). China's anti-Japanese troops fired the first shot of the all-round war of resistance at Lugouqiao.