To solve the problem of advanced combustor liner wall thermal protection, numerical simulation was conducted to study the rhomboid-arrangement effusion cooling，and put forward a method to deal with the grid of rhomboid-arrangement effusion cooling. The liner wall temperature distribution was studied by liquid-solid coupling method, and the calculation of performance for the model combustor was performed by the standard k-ε Model and Non-Premixed (PDF) Combustion Model. The result showed that at the 0.046 fuel-air condition, the rhomboid-arrangement effusion cooling performed better than the alignment, the maximum wall temperature was 806K and the maximum temperature gradient was 20.7K/cm in working condition 1, the maximum wall temperature was 780K and the maximum temperature gradient was 34.4K/cm in working condition 2, which meets the need of wall temperature level for the advanced combustions at high fuel-air ratio.