The invention provides concrete equipment and an arm support thereof. The arm support comprises a main beam made of a first fiber composite material and a reinforced layer which is integrated with a second fiber composite material, and is connected with the main beam, wherein the reinforced layer is arranged on at least one part of the surface of the outer side of the main beam. The arm support is totally made of the composite material; therefore, a weight reduction effect is enhanced, and the impact strength and the structural stability of the arm support are improved greatly.