The present invention relates to bacteriostat, and is one kind of bacteriostatic haydite and its making process. The bacteriostatic haydite is made with carrier, molybdenate, silver salt, copper salt, nanometer zinc oxide, sludge powder of 0.05-0.08 mm, pore forming agent, adhesive and glaze forming agent. Its making process includes the following steps: 1. adding the carrier into deionized water and regulating pH value; 2. adding molybdenate, silver salt, copper salt, nanometer zinc oxide and dispersant through lucifugous stirring; 3. decompression filtering to separate, washing with deionized water, and stoving; 4. adding sludge powder, pore forming agent, adhesive and glaze forming agent, and grinding after adding deionized water; 5. forming and naturally drying; and 6. calcining. The bacteriostatic haydite with carrier of tourmaline, zeolite and shale has high molybdenum carrying amount and high bacteriostatic effect.