Problem-based Learning (PBL) is a teaching model originating from the construc-tivism theory

which stressed the meaning construction in problem situation by collaborative learning

conversation and completing knowledge. Based on the times background

development of learning theory

teaching situation

cognitive strategies

ideological connotation about constructivism

PBL's practical significance

its teaching forms

teaching resources

internal motivation

and the teaching evaluation were analyzed deeply

which was beneficial to carrying out PBL normatively in medical education

so as to provide the theoretical support for further exploration and innovation of PBL.