Abstract: Fermentation bed is a healthy breeding way that based on livestock waste discharge and environmental pollution control.It provides place for the pig frolic and turn, accord with animal welfare and low carbon emissions, realize the requirement of 'zero’ emission pollution, improve the welfare of pigs and production performance;reduce the breeding cost, gastrointestinal diseases and antibiotics medication use.Four aspects are reviewed in the improved of fermentation bed and principle, application and problems of raising .

Key words: fermentation bed; ecological raisepigs; healthy breeding