This paper focuses on the construction technology of cast-in-situ bored piles of the main bridge of the Second Penang Bridge of Malaysia. The main bridge of the Second Penang Bridge of Malaysia is a double-tower cable-stayed bridge. Each tower is supported by 21 pieces of φ 230 ~ 200 cm bored piles with a maximum length of 126.9 m. The piles are designed to be socketed into the penetrating weathered rock layer of 8m in depth, and with a maximum bored-hole layer of 133.15m in length. From the construction management on marine bored pile of the Second Penang Bridge, we sum up construction techniques of the equipment selection, drilling, concreting, statistic test of bored pile and others, and accumulate valuable experience for similar pile construction.