The straight rubber waterstop is generally made of EPDM, which has good anti-aging performance. The most commonly used specification is 450 * 15mm. The straight rubber waterstop is a new type of rubber waterstop, which is mainly used in expansion joints of subway projects. Its processing technology is relatively complex and cumbersome. It is a rubber waterstop used for deformation joints in subway construction, which has been successfully used in Xi'an Metro Line 5. Its function and effect are already very obvious. Another type used in conjunction with it is a detachable U-shaped waterstop. Two types of waterstops are matched up and down to protect the overall building from minor changes in the deformation joint. The small V-shaped groove in the middle of the water stop strip is also effective in removing a small amount of accumulated water, solving the problem of small underground water accumulation.