The invention discloses an SnS mixed energy storage negative pole plate for lithium ion batteries and a method for preparing the SnS mixed energy storage negative pole plate, and belongs to energy storage negative pole plates for batteries and methods for preparing the energy storage negative pole plates. The method includes vulcanizing Sn-based composite energy storage precursor materials to prepare SnS-based composite energy storage materials, uniformly mixing the SnS-based composite energy storage materials, copper-loaded acetylene black, polyvinylidene fluoride and N-methyl pyrrolidone solution with one another to obtain mixtures, then coating the mixtures on plates and drying the plates to obtain SnS-based composite energy storage electrodes; ultrasonically mixing oxidation mesocarbonmicrobead solution and dopamine hydrochloride with each other to obtain mixtures, then directly coating the mixtures on the outer surfaces of the SnS-based composite energy storage electrodes and drying the SnS-based composite energy storage electrodes to obtain the SnS mixed energy storage negative pole plate. The SnS mixed energy storage negative pole plate, and the method have the advantages that buffer carbon layers are coated on the outer surfaces of the SnS-based composite energy storage electrodes to form the SnS mixed energy storage negative pole plate, SnS active substances in the SnS/coal-based activated carbon/graphene composite energy storage materials can be coated and immobilized by the buffer carbon layers, volume change of the SnS active substances can be restrained, and the chalking and falling of active substances on current collectors can be prevented; the specific capacity of the SnS mixed energy storage negative pole plate is 1.8-3.0 times the specific capacity ofexisting negative pole plates for existing lithium ion batteries, and the SnS mixed energy storage negative pole plate can be applied to hybrid electric vehicles and full electric vehicles.