Based on the limit equilibrium method, the impact of the hollow rate of prefabricated modules into the connection stability analyses of geosynthetic reinforced soil (GRS) walls was involed. The calculation formula of the tensile force and the resistance of the connection to assess the connection stability of GRS walls with prefabricated modular panel were established. Parametric studies were conducted to investigate the influence of the hollow module panel filler, the internal friction angle of the reinforced fill, the module width and the reinforcement spacing on the connection stability. The obtained results demonstrate the connection stability decreases with the increase of the module hollow rate, especially for the lower part of the retaining wall, the module with lower hollow rate and the compacted filling soil should be used in the actual project; the connection stability also decreases with the decrease of the module width and the increase of the reinforcement spacing, and it becomes more pronounced as the wall height decreases. It is recommended that the module width should not be less than 0.2 m, and the reinforcement spacing should not be exceeded 0.3 m.