Construction method of retaining wall

A construction method of a retaining wall includes preparing a bin position or a foundation pit; burying a plurality of grouting floral tubes for grouting cement mortar at the bin position or the foundation pit; landfilling rubbles and/or gravels at the bin position or the foundation pit; and grouting cement mortar or cement paste into the grouting floral tube to achieve the retaining wall construction with a low construction cost. According to the method, cement mortar is grouted in the rubbles, therefore the retaining wall construction is achieved conveniently and fast, the construction cost is reduced effectively, the method is particularly suitable for construction of highway retaining walls, joint dams on both sides of a hydraulic dam, groins for hydraulic stream guidance or channel improvement, masonry of groins and longitudinal dikes and the like.