The invention provides a mast support, comprising a base assembly composed of thin-walled members, a rod body assembly and a top rod assembly, wherein the base assembly comprises a bottom rod, a bottom rod mounting seat and a base frame, the rod body assembly comprises a first standpipe, a second standpipe and an intermediate standpipe, the intermediate standpipe is formed by butting a plurality of third standpipes end to end, and the top rod assembly comprises a top rod and a cross rod; A base frame is fixedly arranged on the ground, The bottom rod mounting seat is detachably fixed on the base frame, the bottom rod is detachably mounted on the bottom rod mounting seat, the first standpipe detachably sleeves the bottom rod, the intermediate standpipe detachably sleeves the first standpipe,the second standpipe detachably sleeves the intermediate standpipe, and the top rod detachably sleeves the second standpipe. The mast support is composed of thin-walled parts, which is light in weight and convenient to carry, and only needs butt joint when installed, and does not need hydraulic pressure and other driving equipment, so the installation process is simple and operation is easy.