Abstract: Empirical analysis using relevant data of Tokyo is carried out about the influence of suburban rail transit line on residential land price. Control variable method is adopted to quantitatively study how point of interest is influencing land price. Based on the revised land price, station influencing area and land price appreciation are obtained. Method of quantifying accessibility improvement of suburban line is proposed. Taking the land price points around stations that demonstrate land price appreciation along Tokyo central line as study objective, relationship between accessibility improvement and residential land price appreciation is analyzed. It is found that the contribution of rail transit to residential land price appreciation has positive correlation with accessibility improvement, and negative correlation with access distance.