NOVELTY - Piglet welfare breeding device comprises a pigsty (1). The pigsty is surrounded by walls and a herringbone roof is arranged at the top of pigsty. Passages (2) are arranged at the bottom of the pigsty and close to the walls opposite to each other. A row of sow obstetric tables (3) are arranged on the inside of each passage. A fermentation mattress material pool (4) is formed between two rows of the sow obstetric tables. A chlorine dioxide micro-adding drinking water disinfection and drop-leaching system and a fermentation mattress material atomizing spraying system are arranged in the pigsty.    USE - The piglet welfare breeding device is useful for decreasing weaning and group-breeding stress of piglets (claimed).    ADVANTAGE - The device reduces construction, utilization and maintenance cost, and utilizes less amount of feed antibiotic growth promoting agent.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for piglet welfare breeding for decreasing weaning and group-breeding stress of piglets, comprising (i) introducing farrowing crates from delivery room into constructed chamber, breeding sows for 3-7 days into the trip, introducing the delivery date of a similar trip sow into multiple adjacent column sows bed and separator plate in the middle of the next trip, and completely separating fermentation mattress material pool, (ii) leading the piglet feeding zone to fermentation mattress material pool at the door, rearing 1-14 days old piglets in piglet feeding zone, incubating in an incubator zone, opening the piglet feeding area after 15-20 days, leading from the fermentation mattress material surface to the pool at the door, allowing free access to piglets, placing in the fermentation mattress material chute pool, enabling piglets to move from feeding zone to fermentation bed side and providing drinking bowl for drinking water, introducing piglets from fermentation mattress material pool after 21-25 days into production bed, opening door at night to allow the piglets to rest in production bed, gradually reducing the number of piglets nursing for 26-28 days, feeding the piglets, placing the non-lactating pigs in the fermentation mattress material pool, feeding in the production area bed when the age of the piglet is 29 days old, then feeding in the fermentation mattress material, weaning to about 35 days a week, and simultaneously transferring to fermentation bed, and (iii) carrying out fermentation mattress material management, where the fermentation mattress material management is divided into fermentation management, lactating sow farrowing bedding management and composting.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the piglet welfare breeding device is useful for decreasing weaning and group-breeding stress of piglets.    Pigsty (1)    Passages (2)    Sow obstetric tables (3)    Fermentation mattress material pool (4)    Chlorine dioxide micro-adding drinking water disinfection device (18)