During the construction of the lock button steel pipe pile cofferdam, there are many problems, such as frequent construction procedure conversion, various load cases, and complex design and calculation. Therefore, Based on the Jialing River Bridge 18# pier cofferdam construction, the scheme selection, esign and review of "T-C" lock button steel pile cofferdam, cofferdam construction, etc.,were discussed.and studied, and a set of design and construction method of "T-C" lock button steel pipe pile cofferdam which was practical and suitable for construction of dense sand and pebble riverbeds were summarized. The results show that the design and construction method in accordance with the actual, can better guide the construction, in the process of optimization measures, to further improve the work efficiency, solved the construction problems, which has the certain reference value for lock button steel pipe pile cofferdams in similar riverbed geological conditions.