The invention provides a preparation method of a porous hard carbon negative electrode material, comprising the following steps: a) mixing a nano material, a solvent and a carbonaceous precursor, andthen evaporating to remove the solvent to obtain a mixture of the nano material and the carbonaceous precursor; B) sequentially solidifying, carbonizing, crushing, grading, etching and high-temperature quenching and tempering the mixture obtained in the step a) to obtain high-temperature quenched and tempered powder; C) coating the powder obtained in the step b) to obtain a porous hard carbon negative electrode material. Compared with the prior art, the invention takes nano material and carbonaceous precursor as raw materials, adopts specific process steps, optimizes the distribution of micro-nano pores, establishes lithium ion transport channel, and obtains porous hard carbon negative electrode material with uniform pore distribution, fine and exquisite, and has higher specific capacity,first efficiency, and fast charging and discharging capacity.