Permeable sand dam

The utility model relates to an open type sand blocking embankment which comprises a plurality of precast piles arranged at intervals, a sand blocking part is connected between every two adjacent precast piles, and the sand blocking parts are used for blocking sand. The sand blocking part comprises a sand blocking screen frame, and when the sand blocking part is connected to the two precast piles, the two sides of the sand blocking screen frame are connected with the corresponding connecting parts respectively to form fixation; sand blocking screen cloth is fixedly connected into the sand blocking screen frame. Compared with a traditional sand blocking embankment, the open type sand blocking embankment is more eco-friendly due to the fact that the open type structure is adopted; the pile foundation is of a prefabricated structure, factory prefabrication is achieved, efficiency is high, quality is good, on-site construction dust, waste water and the like are reduced, and green and civilized construction is fac