The invention discloses a production method for manganese sulfate by using low-grade manganese ores. According to the method, manganese sulfate with high purity can be produced by using waste low-grade manganese ores with manganese content of 10% to 20%, manganese tailing or manganese-containing solid waste residue. The method comprises the steps of preparation of raw materials, a slaking reaction, a leaching reaction, neutralization and purification of leachate, etc. According to the invention, production of manganese sulfate is not restricted by the grade of manganese ores, and low-grade manganese oxide ores with a grade greater than 10%, manganese tailing or manganese-containing solid waste residue can be fully utilized; produced manganese sulfate has high yield and high purity and is a very important industrial fundamental product; almost no external heat supply is needed, low energy consumption is achieved, production cost is low, it does not need to turn over and mix materials in the process of the reactions, the reactions are smooth, no toxic gas is generated, and no environmental pollution is produced; discharge of three wastes (waste gas, waste water and industrial residue) reaches national discharge standards for environmental protection, and there is no dust pollution in a workshop.