从一部国产科幻大片《流浪地球》的一项宏大计划出发，针对该计划第二步———让地球脱离太阳系，利用动量守恒定律、动能定理和逃逸速度、有效反冲喷射速度概念，计算了在地球质量能够满足生命存在的需要的条件下，让它脱离太阳系所需的最少做功为2.72×1032焦耳，并从能源角度讨论让地球脱离太阳系的可能性问题.

Starting from a grand plan of a domestic sci-fi blockbuster“The Wandering Earth”，the minimum mechanical work needed to take the earth out of the solar system is deduced and calculated by using the law of conservation of momentum，theorem of kinetic energy，and concept of escape velocity and effective recoil jet velocity. The result is 2.72×1032 J，and the possibility of separating the earth from the solar system is discussed from the perspective of energy.