Steel sheet pile is a kind of steel with a lock. Its cross section includes straight plate, groove and Z shape, etc., with various sizes and interlocking forms. Common ones include Larson type and Lackawanna type. Its advantages are: high strength, easy to drive into hard soil layer; can be constructed in deep water, and add inclined support to form a cage when necessary. Good waterproof performance; can form cofferdams of various shapes as needed, and can be reused many times, so it has a wide range of uses.

Steel sheet pile products are divided into two types according to the production process: cold-bent thin-walled steel sheet piles and hot-rolled steel sheet piles.