The invention discloses a large-sized hammering block shock absorber and an installation method thereof. Firstly, an outer shell is made of a steel plate; a plurality of springs are arranged at the bottom of the outer shell; an inner shell capable of accommodating the outer shell is arranged above the spring; a joist steel is arranged on an upside, corresponding to the springs, of the bottom of the inner shell; a layer of steel plate is paved on the joist steel; a big square timber pile flush with the inner shell is arranged on the steel plate; and a large-sized hammering block or air hammer can be arranged on the square timber pile. In order to prolong the service life of the shock absorber, a certain amount of engine oil is filled in the outer shell and the inner shell. When the shock absorber is used, a pit of the same size as the hammering block shock absorber needs to be dug on the ground; the bottom of the pit is filled with concrete; the surround of the pit is built by bricks or concrete; then the bottom of the pit is paved with a layer of old tire sheet; and the hammering block shock absorber and the hammering block can be used after being placed on the old tire sheet.