The invention belongs to the technical field of LNG low temperature storage tanks and particularly relates to a high-protecting-performance LNG low temperature storage tank convenient to move. A tankbody, a corner force bearing framework playing a protecting and hoisting role around the tank body, a liquid level monitoring device, a self-supercharging device, a leakage monitoring device, a PLC control device and a cold insulation device are included; universal wheels are arranged at the bottom end of the corner force bearing framework; the corner force bearing framework is arranged around thetank body, and plays the tank body protecting and hoisting role; the corner force bearing framework is provided with the universal wheels, movement is convenient, filling is easy and convenient, andthe safety risk is greatly reduced; the leakage monitoring device judges whether leakage happens or not by detecting the tank body temperature and outside environment temperature difference, the structure is simple, the monitoring precision is high, and the leaking risk is reduced; the liquid level monitoring device is used for monitoring the liquid level in the tank body, measuring is accurate, and the safety performance of the tank body is improved; the arrangement of the cold insulation structure facilitates keeping the low temperature environment in the tank body; and the overall structureis simple, design is reasonable, and the safety performance is high.