The invention provides a honeycomb geocell earth retaining wall with an ecological restoration function and a construction method thereof. The honeycomb geocell earth retaining wall comprises a foundation arranged on the ground and a wall body arranged on the foundation; the wall body comprises a reinforced bed course, a composite geo-membrane, reinforced polypropylene water storing and draining modules, a filament geotextile and honeycomb geocells, wherein the reinforced bed course, the composite geo-membrane, the reinforced polypropylene water storing and draining modules, the filament geotextile and the honeycomb geocells are sequentially arranged on the surface of a slope in a paving mode; the foundation and the reinforced bed course each comprise reinforced lime earth improving loess, polypropylene two-way geogrids and a drain pipe; the multiple polypropylene two-way geogrids are parallelly arranged in the reinforced lime earth improving loess; and the drain pipe in the reinforced bed course and the drain pipe in the foundation are connected with the reinforced polypropylene water storing and draining modules correspondingly. The provided honeycomb geocell earth retaining wall with the ecological restoration function is high in bearing capacity, dynamics performance, slide resistance and erosion resistance and can be filled with a gravel soil layer, grass is planted in the gravel soil layer, not only can water and soil erosion be effectively prevented, but also a greening function is achieved, and accordingly, effective combination of ecological restoration and engineering management is achieved; and the construction method is simple, construction is convenient, and the cost is low.