Abstract： Objective To explore the curative effect of prealbumin (PA) in the hand-foot-and-mouth dis-ease and analysis its value in monitoring and prognosing this disease. Method Detect levels of serum PA of 390 ca-ses of children before, after and during the treatment and compare the changes during the treatment. Then observe the prognosis. Results There are significant difference of PV levels between cases of different prognosis (P < 0.05). Conclusion The PV levels of children of hand-foot-and-mouth disease will change significantly after effective treat- ment. There are clinical significance in observing and prognosing the hand-foot-and-mouth disease by detecting the se-rum PV levels.