The invention provides a multi-pipeline conveying system and method of a multi-level pump station ore pulp pipeline. The conveying system at least comprises a first level pump station, a second level pump station and a third level pump station. Each level pump station comprises two or more pipeline conveying units. Each pipeline conveying unit comprises a stirring groove and a main pump. The different pipeline conveying units of the two adjacent levels of pump stations can be switched mutually to form a multi-pipeline conveying path. The conveying method comprises the steps that firstly, different levels of ore pulp conveyed by a mill plant are conveyed to different concentration basins in the first level pump station respectively; secondly, the pipeline conveying units of all levels of pump stations are selected according to the different levels of ore pulp, and the ore pulp is conveyed to a preset dehydrating station. The ore pulp is conveyed based on the sharing of the stirring grooves of the all levels of the pump stations and switching among the conveying pipelines, different levels of ore pulp can be conveyed at the same time, the conveying efficiency of a ore pulp pipeline system is greatly improved, and the environment pressure is reduced.