A water-preserved mining method capable of reducing the water-flowing fractured zone development height through overburden strata water infusion filling is particularly suitable for water resource protection and subsidence control of coal mining and is characterized in that related geological data of overburden strata are acquired at first, an appropriate opportunity is chosen to drill in a reasonable position, high-pressure water infusion is performed on the overburden strata, and rock mass at the lower part is actively compacted through pressurized water infusion of a separation area, so that the purpose of reducing the water-flowing fractured zone development height is achieved, the thickness of an aquiclude between the water-flowing fractured zone development height and an aquifer is indirectly increased, the water blocking ability of the aquiclude is improved, water resource protection under high-strength mining of western mines is realized, and the water-preserved mining method is a main part of green mining of coal mines. The water-preserved mining method is simple, convenient to operate, high in practicability, less in capital investment, low in cost and pollution-free to the aquifer; meanwhile, water resources discharged by the mines can be fully utilized; and the problems of lots of underground water loss, water pollution and poor water preserving effect during conventional mining can be solved.