Abstract: The determination on laying parameters of geotextile is one of the key contents in design of reinforced soil walls. In order to make full use of the reinforcement performances, based on the variable coefficient method of earth pressure and the 0.3H(H represents the height of the retaining wall) potential failure mode, the relations between reinforcement spacings and reinforcement length were analyzed, the calculation method of reinforcement lengths with a certain reinforcement spacing or reinforcement spacings with a constant reinforcement length was established, the reinforcement consumption was analyzed through a calculation example in which the reinforced soil wall was designed by different reinforced methods. The results showed that:when reinforcement spacing was invariable, the anchorage length of reinforcement was proportional to the coefficient of the earth pressure at the depth of the reinforcement; when the reinforcement anchorage length was constant, the reinforcement spacing was inversely proportional to the coefficient of the earth pressure at the depth of the reinforcement; compared with the traditional equal length method, the two methods proposed in the paper were of obvious economic advantages, and the higher the retaining wall, the greater the saving of reinforcement.