As a new type of pile developed in the past decade, reinforced composite piles are very suitable for geological sites with deep sandy soil layers and low pile end bearing capacity. They have significant advantages such as high lateral friction, high bearing capacity, and practical efficiency. Based on the practice of pile foundation engineering, this paper compares and analyzes the design of three types of piles: underwater drilled cast-in-place piles, prestressed concrete pipe piles, and stiffened composite piles. The ultimate bearing capacity of stiffened composite piles is verified through design test piles, and the settlement of stiffened composite piles is analyzed using YJK software. Compared to traditional pile forming methods such as underwater drilled cast-in-place piles and prestressed concrete pipe piles, rigid composite piles have significant advantages in terms of technology, economy, and work efficiency. Especially in the design of pile foundations in deep sandy soil layers, it is preferred to use rigid composite piles as the preferred solution. Considering the unique structural characteristics of reinforced composite piles, corresponding requirements for pile forming technology have been proposed.