Objective\ To determine the growing index of SPF miniature pig.Methods\ The Chinese No.1 miniature pig by laparohysterotomy was fed with the SPF feeding method in isolator,and its weight,body\|length,thorax circle,and body\|height were measured separately at new\|born day,30?d,60?d,compared with the miniature pig of same age fed in the natural circum\|stance.Results\ The body weight,length,height and thorax circle of pigs fed in natural circumstance were all larger than those of the SPF feeding miniature pigs ( P <0.01,0.01< P <0.05).The coefficients of correlation of the body weight\|length\|thorax circle and height of the SPF miniature pig were separately 0.978,0.977,0.982 in new\|born condition;0.900,0.916,0.982 at 30?d; 0.917, 0.896,0.913 at 60?d.Conclusions\ The above growing index of SPF miniature pig are basically in consistence with that reported in papers.