The invention discloses a non-oriented electric steel semi-organic phosphate insulating paint with good corrosion resistance. The semi-organic phosphate insulating paint comprises the following main components: water-soluble phosphate, tungstate, organic resin, water, a titanate coupling agent, an organic solvent and the like; and contents of the components of the insulating paint (parts by weight) based on 100 parts of the water-soluble phosphate by weight are as follows: 1-15 parts of the tungstate, 20-200 parts of the organic resin, 500-2000 parts of the water, 0.1-3 parts of the titanate coupling agent, 10-50 parts of the organic solvent and 0.1-3 parts of other paint addictives. The semi-organic phosphate insulating paint contains no harmful ingredients restricted by an EU directive RoHS, which can meet the requirements for environmental protection; and compared with the common phosphate coating, the coating of the semi-organic phosphate insulating paint has better corrosion resistance, good insulating property, good adhesiveness, good blanking property, good welding property, good heat resistance and the like, which can meet the requirements of electric motor and transformermanufacturers for application to the electric steel coating.