Abstract: Coal rejects, fly ash and other solid material transported from surface ground to the underground mine would be a base to implement the fully mechanize d solids backfill mining technology.To realize a high efficient and continued transportation of the solids backfill material, a solid material transportation technology with a material feeding well sunk from the surface ground to the underground mine was applied.A vertical feeding well structure including the feeding pipeline, the maintenanc e chamber and the material storage bunker was designed.A rational diameter for the pipeline was studied and obtained.Based on the impact problem occurred during th e solids feeding, cone buffer was designed.Meanwhile, in order to ensure the normal operation of the coal mining face and the safety of the personnel and environment, a study was conducted on the dust contral of the vertical feeding, discharging of high pressure air flow, jamming prevention bunker of the vertical feeding, cleaning of th e material storage bunker and other safety protection technology.The vertical transportation system of the solids material was successfully applied in Wugou Mine.