The invention provides a water-soluble type alkaline paint remover. The water-soluble type alkaline paint remover is prepared from the following raw materials in parts by weight: 90 to 110 parts of ethylene glycol ether, 95 to 115 parts of methyl ethyl ketone, 35 to 50 parts of N-methyl-2pyrrolidone, 130 to 150 parts of aluminum magnesium silicate, 40 to 60 parts of sodium silicate, 5 to 15 parts of sodium hydrogen carbonate and 90 to 110 parts of water. A preparation method comprises: adding the water into a glass container; adding the ethylene glycol ether, stirring and dissolving; then adding the methyl ethyl ketone, the N-methyl-2pyrrolidone, the sodium hydrogen carbonate and the sodium silicate in sequence, and stirring and dissolving; finally, adding the aluminum magnesium silicate to obtain the water-soluble type alkaline paint remover. The paint remover provided by the invention has a high paint removing capability, has low toxin and is environment-friendly and is incombustible; the paint remover is a weak-alkalinity medicament, has no corrosion on a base body, is a water-soluble medicament and has no volatilization; the paint remover has no harm to the environment and human bodies and has high adaptability.