The invention provides a territorial space planning building measuring device, which is characterized by comprising a tripod, a fixed sealing mechanism, a lifting mechanism, a single-point fixing mechanism, a fixing plate, a swing rod and a GPS surveying instrument, a first shell is detachably fixed at the top of the tripod, a second shell is fixed at the top of the first shell, the fixed sealing mechanism is slidably mounted on the inner wall of the first shell, and the lifting mechanism is slidably mounted on the inner wall of the first shell. The lifting mechanism is installed on the inner wall of the first shell and used for driving the fixed sealing mechanism to ascend and descend, the fixing plate is fixed to the inner wall of the second shell, and a through hole is formed in the middle of the fixing plate. The GPS surveying and mapping instrument can be automatically leveled on the tripod, surveying and mapping efficiency is improved, the GPS surveying and mapping instrument is arranged in the second shell, the GPS surveying and mapping instrument can be limited and fixed after being leveled, influences of external factors are prevented, stability is improved, the horizontal state can be detected in real time, surveying and mapping precision is improved, and the GPS surveying and mapping instrument is suitable for popularization and application. And the GPS surveying instrument can be clamped, fixed and protected when not used or moved, so that the safety is improved.