TECHNOLOGY FOCUS - BIOLOGY - Preferred Method: The selecting step comprises selecting guinea pig farm located at leeward sun with good height, residential area and illumination condition, large farm pollution source far away from the road, noise source and low wind direction by drying, ventilating and draining. The constructing step comprises constructing open ground with anti-proof layer, arranging heat preservation window to summer night open window in a wall of the ground and constructing roof of the pig bed with heat preservation double-layer for winter and summer. The farming step comprises raising fish in ponds in three-dimensional way or dissipating into the atmosphere-raising, introducing captive box guinea pig in a flat-breeding pools, which are divided into small cells with bricks, cement, plate, stone, fence or iron mesh and a bottom of the cells contains bedding lime rice husk and sawdust or dry straw to facilitate the warm moisture. The planting step comprises planting grass in cool and hot season by a hot quaternary type grass wheel, where the grass is from the family poaceae variety, and sowing and mixing leguminous forage, bamboo, sweet Sorghum, ryegrass, soybean, alfalfa and white clover. The feeding step comprises cutting the grass with a length of 10 cm, daily feeding the guinea pig with 80-120g of cutted grass, where each day feeding amount is 150-220 g, mixing the grass with corn (30-35%), cypress (15-18%), wheat bran (15%), rice bran (35%), salt (1%) and trace elements (1%), feeding twice a day with mixed feed and then with drinking water and fresh vegetable. The management step comprises managing the feeding content of the pig using different columns, where the column is divided into hot weather birth of 15-20 days and cold weather winter birth of 20-25 days of pig according to size and weight, and facilitating uniform growth. The treatment step comprises putting the concentrated guinea pig manure by fermenting at high temperature to prepare organic fertilizer and then introducing into soil to improve physical and chemical properties and structure, promoting quick grass yield by step size, absorbing fecal dirt to avoid pollution, and changing waste into valuable to realize ecological cultivation.