The utility model discloses a sliding type sand blocking wall and a sand blocking wall system. The device comprises a stand column and a sand baffle, the number of the stand columns is two, the standcolumns are provided with sliding grooves, the number of the sand baffles is at least three, the two ends of each sand baffle are embedded into the sliding grooves respectively, the sand baffles are sleeved with pipe hoops, the adjacent pipe hoops are connected through the supporting columns, the two ends of the sand baffle located on the top layer are connected with one ends of ropes respectively, and the other ends of the ropes penetrate through holes in the tops of the stand columns and are fixed to the stand columns. The sliding type sand blocking wall is light in weight, high in durability, stable in structure and low in manufacturing cost; the sand blocking plate can be repeatedly used to slide at different stand column heights, construction and operation are easy and convenient, sand prevention benefits are good, the purpose of prolonging the service life of the sand blocking wall can be achieved when sandstorm prevention is conducted in large sandstorm areas such as a thyme wind area and a smoke pier wind area, and the sand blocking wall can be popularized and used in the areas in a large range.