Against the backdrop of global infrastructure investment and resource development, the African market is becoming a core growth area for Chinese construction machinery companies expanding overseas. As the "infrastructure cornerstone" of Africa's industrialization process, block making machines present a unique opportunity in the South African market, intertwined with policy dividends and demand upgrades. This article analyzes China's block making machine exports to the South African market from three dimensions: policy environment (access rules, bilateral agreements), market demand (infrastructure-driven, supply-demand gap), and technological adaptability.