Protective structure for preventing gully from being eroded and construction method of protective structure

The invention discloses a protective structure for preventing a gully from being eroded and a construction method of the protective structure. The protective structure comprises gully slopes and a gully head, wherein the gully slopes are positioned on two sides of the gully; the gully head is positioned at the front end of the gully; stairs are separately arranged on the gully head and the gully slopes; a tire is laid on each layer of stair; the tires are connected with one another through iron wires; anchor rods are arranged in the tires at intervals of 0-2 layers of stairs; each two adjacentanchor rods in the same layer are spaced from each other by 0-3 tires; 1-2 plants of vitex chinensis mill are planted in the center of each tire; and a measure of protecting the slopes by stacked tires is taken, the waste tires are selected as main materials, and vegetation operation can be carried out while engineering stability is guaranteed. The protective structure has three functions of preventing the gully head fro