The invention relates to an earth-layer internally strutting umbelliform earth anchor head for anchoring an earth layer and a strutting tool thereof, solving the problems that the prior earth anchor cThe invention relates to an earth-layer internally strutting umbelliform earth anchor head for anchoring an earth layer and a strutting tool thereof, solving the problems that the prior earth anchor core, the anchorage force is great.the drawing force of a single earth anchor head can reach 150 KN to 500 KN, therefore, the anchorage force is great.d the drawing force of a single earth anchor head can reach 150 KN to 500 KN, therefiod, and the earth anchor can immediately bear after pretightening force is exerted by the opened bearing plates. A vertical projected area after the anchor head is opened can reach 0.7-1.5m <2>, and iod, and the earth anchor can immediately bear after pretightening force is exerted by the opened bearing plates. A vertical projected area after the anchor head is opened can reach 0.7-1.5m <2>, aneranged on the pushing rod at the lower part of the sliding sleeve. The invention has the advantages of simple structure, less construction working procedures, convenient operation and short working peranged on the pushing rod at the lower part of the sliding sleeve. The invention has the advantages of simple structure, less construction working procedures, convenient operation and short working prran not immediately bear and has the problems of weak anchorage force, longer steel nooses, more construction working procedures, and the like. The invention provides the anchor head and the struttingan not immediately bear and has the problems of weak anchorage force, longer steel nooses, more construction working procedures, and the like. The invention provides the anchor head and the struttingtool, wherein the anchor head is formed by the hinged connection of two bearing plates, and a pushing groove is arranged at the hinged joint of the two bearing plates; the inner sides of the two bearitool, wherein the anchor head is formed by the hinged connection of two bearing plates, and a pushing groove is arranged at the hinged joint of the two bearing plates; the inner sides of the two bearing plates are connected by a flare-angle limit chain and respectively connected with an earth anchor steel noose; a triangle earth-cutting guide head is arranged at the front end of a pushing rod of tng plates are connected by a flare-angle limit chain and respectively connected with an earth anchor steel noose; a triangle earth-cutting guide head is arranged at the front end of a pushing rod of the strutting tool, a sliding sleeve is sleeved on the pushing rod, both ends of the sliding sleeve are respectively connected with a connecting plate and a fan-shaped protrusion, and a limit ring is ahe strutting tool, a sliding sleeve is sleeved on the pushing rod, both ends of the sliding sleeve are respectively connected with a connecting plate and a fan-shaped protrusion, and a limit ring is arr