With the development of China's economic construction, the construction of long-span suspension bridge has been put on the agenda. As we lack experience in the design and construction of large-span suspension bridge, we still need to learn from foreign experience for our use. The clamp is an important component of the pressure cylinder. Its strength is directly related to the pressure bearing capacity and sealing effect of the pressure cylinder, and is the key component of the pressure cylinder sealing device. The structure strength and stress check standard of clamp under load. Through the finite element calculation, the strength calculation results of the clamp are obtained. First, release the original UV glue, and then pour the UV glue into the empty pressure cylinder. After a period of time, the UV glue in the pressure cylinder will produce bubbles, resulting in unstable glue delivery.