A sand buggy has a main frame. A pair of connection rods are disposed on the main frame. A positioning seat which is connected to the connection rods has two lower rotating shafts. A movable mount has two pairs of lug panels to receive the lower rotating shafts. Two front shock absorbers are connected to a-suspension arm and a positioning plate. A first and a second positioning mounts are disposed on the main frame. A first movable seat is inserted in the first positioning mount. A pair of first lug plates are disposed on the first suspension link. A second movable seat is inserted in the second positioning mount. A pair of second lug plates are disposed on the second suspension link. A first rear shock absorber is positioned by the first lug plates. A second rear shock absorber is positioned by the second lug plates. A main shaft is connected to the first and the second rear shock absorbers.