Objective:To investigate the effect of problem-based learning (PBL) in emergency medicine teaching.Methods:84 students of Grade 2003 were randomly divided into two groups:control group (n=42) was taught by traditional teaching method and experimental group (n=42) by PBL。After learning,the tests were used to evaluate the result.Results:The results of exam showed that the students in experimental group had a significant higher score than those in control group(P