The invention discloses an automatic material conveying system. The automatic material conveying system comprises a guide rail, a material mixing trolley, material quantitative conveyors and a storagetank, wherein the guide rail is horizontally arranged on the ground in a linear manner, the material mixing trolley can move on the guide rail, the multiple groups of material quantitative conveyorsare arranged above the moving track of the material mixing trolley at intervals, the storage tank is arranged below the middle position of two pathways of the guide rail; woven bags are placed in thestorage tank and is used for receiving materials and facilitating packaging and conveying, the material mixing trolley comprises a bearing platform, rolling wheels are arranged below the bearing platform and are arranged on the guide rail in a clamped mode, and a material mixing bin and a control cabinet are arranged on the bearing platform. The automatic material conveying system has the advantages that the material quantitative conveyors and the material mixing trolley are used in a coordinated mode, automatic proportioning and conveying can be realized by adopting a control system, and therefore the accuracy of the material mixing ratio can be improved, and meanwhile, the material conveying efficiency can be improved.