The invention relates to a bottom-emitting organic electroluminescence device and a preparation method of the bottom-emitting organic electroluminescence device. The bottom-emitting organic electroluminescence device comprises a conductive anode base, a hole injector layer, a hole transport layer, an electron barrier layer, a luminescent layer, a sulfide layer and a metal cathode which are sequentially stacked. According to the organic electroluminescence device, the sulfide layer is prepared to be used as an electron transport and injection function layer, a sulfide semiconductor belongs to an n-type semiconductor material, a relatively direct and complete conduction band path is provided for electron jump transmission, jump times of electrons in a transmission path is reduced, the migration rate of the electrons is further enhanced, and the transmission capacity of the electrons in the device is improved.