The factors that cause the leakage of the hydraulic system of construction machinery are the result of various comprehensive influences. With the existing technology and materials, it is difficult to fundamentally eliminate the leakage of the hydraulic system. Only from the above factors affecting hydraulic system leakage, reasonable measures should be taken to minimize hydraulic system leakage. The design and processing of the seal groove should be fully considered in the design and processing links.

　　In addition, the selection of seals is also very important. If the factors affecting leakage are not fully considered at the beginning, it will cause immeasurable losses in future production. Choose the correct assembly and repair methods, and learn from past experience. For example, use special tools as much as possible in the assembly of the seal ring, and apply some grease on the seal ring. In the pollution control of hydraulic oil, we must start from the source of pollution, strengthen the control of pollution sources, and take effective filtering measures and regular oil quality inspections. In order to effectively cut off the pollution of the hydraulic cylinder by external factors (water, dust, particles, etc.), some protective measures can be added. In short, the prevention and control of leakage must be fully implemented and comprehensive considerations can be effective.