The invention discloses a breeding method for purifying and strengthening bamboo rats. The breeding method is characterized by including that 1, a firm shed with good lighting is built, the height of the shed shall meet the requirements on escape prevention, bricks are laid to form an elongated-slot-shaped structure, the roof of the shed is inclined in a herringbone mode, a trough is arranged at the front end of the shed, water troughs are arranged on two sides of the shed, and a dirt discharge gutter is arranged in rear of the shed; 2, healthy and disease-free young rats are selected, arms and legs are stout, and fur is compact, fine, soft, smooth, elastic and straight; 3, coarse feed, high-energy feed, protein feed, proper additives and proper disease preventing and curing drugs are selected, the drugs shall be fed in due time, and all the feed is fed in turn on a time schedule. The breeding method has the advantages that sites are easy to select, feed is easy to obtain, cost is low, benefit is high, rapid propagation and growth are realized, and the bamboo rats are robust and have good body shapes, meat quality and taste.