The aquaculture apostichopus japonicus selenka fluid feed disinfector in a structure of a vehicle-mounted box body, which is provided with three box chambers, wherein one box chamber is provided with a disinfection barrel, an ozone releasing air stone, a feed discharge hole and a power inflation air stone, one box chamber is provided with a switch, a circuit protection device, an ozone generator, a power inflation pump, a power inflation pipe and an ozone releasing pipe, and the bottom box chamber is provided with a feed discharge pipe and a stop valve. The equipment utilizes automatic oxygen released by the ozone generator to kill microorganisms of viruses, germs, moulds an the like in the fluid particle feed, has the advantages of quickness, thoroughness, no residues and low cost, and can disinfect the aquaculture apostichopus japonicus selenka fluid feed and aquaculture appliances, and disinfection efficiency can reach more than 99%. The utility model can replace insecticides or antibiotics for use, so that the medicine residues and aquaculture environmental pollution can be reduced, the incidence rate of diseases can be reduced, and the quality of aquatic products and aquaculture economic benefit can be improved.