Abstract:The allometric growth pattern of Schizothorax waltoni Regan at the age of 0-90 days was studied by experimental ecology. The results showed that the inflection point of larvae growth from slow to fast was 28 days old. Most of the external organs of larvae of S.waltoni Regan had the characteristics of allometric growth. Head and tail grew faster than trunk. Head length, anterior anus length and posterior anus length showed inflection points at 24-25 days, 36-37 days and 37-38 days respectively. Head height and body height presented growth inflection points at 40-41 days and 49-50 days respectively; eye diameter presented growth inflection points at earlier 18-19 days, which promoted the full development of eyes, so as to improve the ability of early larvae to eat exogenous food at the opening stage. Snout length presented growth inflection points at 42-43 days, which promoted the full development of mouth to adapt to different conditions. The growth inflection points of pectoral fin, dorsal fin, pelvic fin, caudal fin appeared at 18-19 days, 39-40 days, 43-44 days, 46-47 days and 37-38 days respectively. The relative total length of pectoral fin and pelvic fin showed positive allometric growth before and after inflection point, but the growth index after inflection point decreased significantly. The swimming ability of larvae of S.waltoni Regan greatly improved. The allometric growth pattern of larvae of S.waltoni Regan guarantees the full development of important functional organs, effectively guarantees the survival ability of larvae after the beginning of exogenous nutrition, and has important guiding significance for early wild resource protection and seedling production.