**Product Overview:** The base of Shandong Tianhai composite drainage board is made of high-impact and high-compression polyethylene (HIPS) and HDPE, which can withstand long-term high pressure without deformation. This long-lasting compressive strength can resist the weight of the concrete base and its load, as well as the unavoidable external pressure and impact during construction, such as vehicles, workers' foot traffic, and the impact of concrete pouring. It maintains the base's shape over time, ensuring the original drainage capacity is preserved. The filter geotextile layer on the base is designed to ensure that the drainage channels do not become blocked by foreign materials, such as backfill soil particles or concrete. **Product Features:** The composite drainage board integrates drainage and waterproofing, successfully addressing the relationship between waterproofing and drainage. It is superior and more reliable than traditional aggregate and expanded clay drainage systems and other filtering layers in terms of drainage function and economic benefits. The composite drainage board combines both waterproofing and drainage, enhancing the durability of projects; its performance aging period reaches 120 years. Durability is a crucial aspect of waterproofing in building structures, which raises new and higher demands for the waterproofing of buildings. Theoretically, a waterproof system constructed with modern flexible waterproof materials can achieve complete impermeability, but these systems are often subject to damage and can still experience leakage in the environment. The composite drainage board can guide and discharge this portion of water, integrating drainage, interception, and blocking into the waterproofing system of the project, thus meeting the new requirements of modern building waterproofing systems.