Objective To analyze the implementation effects of Peer-Assisted Learning on critical thinking ability of undergraduate nursing students. Methods A total of 411 college nursing students were selected with 203 students of Class One Three and Five from grade 2012 majoring in nursing were taken as the control group

others as the experimental group in the experimental teaching of basic nursing. After teaching

the free practice method was used in the control group

while Peer-Assisted Learning was used in the experimental group. CTDI–CV was adopted to evaluate the level of critical thinking ability of the two groups of nursing students. Results The critical thinking ability of nursing students in experimental group scores and seeking truth

analysis ability

self-confidence

inquisitiveness

cognitive maturity

open mind and systematic ability in 7 dimension scores were higher than that before the experiment. (P<0.05). The critical thinking ability of the experimental group total score and the pursuit of truth

analysis ability

self-confidence

inquisitiveness and cognitive maturity in 5 dimension scores were higher than the control group(P<0.05). Conclusion Peer-Assisted Learning is conducive to improve the critical thinking ability of nursing students.