Abstract: The pumped hydro energy storage in abandoned coal mine pits (PHSM) is not only conducive to the reuse of the abandoned coal mine, but also conducive to the consumption of renewable energy power, which can promote the transformation and development of energy supply system in coal resource-based areas.The whole life cycle cost accounting of pumped energy storage in abandoned coal mine is the premise of the popularization of this technology, which is of necessity and practical significance.With reference to the techno-economic data from the groundwater reservoir of Daliuta coal mine, this study establishes the parameter system of PHSM, and then analyzes its economic cost and environmental cost by comparing with conventional pumped hydro energy storage.Finally, the sensitivity analysis is used to obtain the influence degree of each influencing factor on the levelized cost of electricity generation(LCOE).The results show that:if the construction difficulty is not considered, the levelized energy storage cost of PHSM with the same installed capacity is lower than that of the traditional pumped storage power station.Considering the difficulty of construction, if the construction difficulty coefficient of PHSM is less than 1.26 times that of traditional pumped storage, the cost of PHSM is less than that of traditional pumped storage.Meanwhile, when the installed capacity of PHSM is smaller than that of traditional pumped storage, its levelized energy storage cost is higher than that of traditional pumped storage, but it is lower than the local peak valley price difference, so it has economic feasibility.Moreover, the construction difficulty is the key factor affecting the cost of PHSM, and the environmental cost has the least impact on the cost of power generation of PHSM.Finally, the environmental cost of PHSM is low, which accounts for a small proportion in the whole life cycle power generation cost.The PHSM has good environmental benefits.