The utility model relates to an outdoor tool, in particular to a convenient-to-carry simple ground anchor. The simple ground anchor comprises a main anchor rod, wherein a spiral blade is welded at the lower end of the main anchor rod; the diameter of the spiral blade is gradually enlarged from bottom to top; an inwards sunken groove is also formed in the upper end of the main anchor rod; at least one fixing traction rope is connected into the groove; the free end of the fixing traction rope is connected with an auxiliary anchor rod; the auxiliary anchor rod is inserted into the ground, so that the main anchor rod can be further fixed; a matched right-angle four-way joint sleeves the main anchor rod; the other two connectors of the right-angle four-way joint are in threaded connection with matched supporting arms; the two supporting arms are perpendicular to each other. When the simple ground anchor is being used, the traction rope is arranged between the two supporting arms; when the main anchor rod is stressed, the supporting arms achieve a supporting effect, and the main anchor rod is prevented from being pulled to be bent; meanwhile, the fixing traction rope is in the opposite direction of the pulling force; the auxiliary anchor rod is inserted into the ground, and force in the opposite direction is applied to the main anchor rod, so that the main anchor rod cannot be pulled out or bent. The simple ground anchor is simple in structure, convenient to operate and carry and suitable for popular use.