As a core piece of equipment in building materials production, the capacity selection of block brick making machines directly impacts the return on investment. Many investors hold the misconception that "higher capacity is more cost-effective" or "lower-priced equipment saves more money," neglecting the balance of costs throughout the entire lifecycle, including procurement, energy consumption, labor, and maintenance. Data shows that selecting a block brick making machine with a reasonably matched capacity can reduce the overall project budget by more than 30%, while mismatched capacity may lead to idle equipment or insufficient capacity, resulting in double waste. This article will provide investors with a scientific selection reference by breaking down the equipment costs of different capacity ranges.