The utility model discloses a mesh steel structure gravity ground anchor type load test device. According to the mesh steel structure gravity ground anchor type load test device, a reinforced concrete foundation is arranged in a foundation pit, a mesh steel structure bearing element is embedded into the reinforced concrete foundation in advance, the bearing center of the mesh steel structure bearing element is equipped with a bearing spindle, and the bearing spindle is connected with a load device. The device of the utility model has a certain area and can be used to support(or install) various tested heavy whole-set mechanical equipment, and the device is connected with the mesh steel structure bearing element through the bearing spindle, so the gravity ground anchor can be used to bear a pull force in the vertical direction, and can also be used to bear an upwards pull force in the included angle range of alpha with respective to the vertical direction, so load tests can be performed on the heavy whole-set mechanical equipment in complex working conditions.