Objective　To evaluate the feasibility of the task-based teaching mode in dose measurement of tumor radiotherapy to develop the independent practical ability of students. Methods　Twenty-one undergraduate students majoring in radiotherapy dosimetry were randomly divided into experimental group (n=11) and control group (n=10). The task-based teaching mode based on independent learning

thinking and designing was used in the experimental group

while the traditional teaching mode based on the guidance of teachers was applied in the control group. Then the practical examination of students was carried out through the case of measuring the absorbed dose of accelerator electron beam. The practical ability of the two groups of students was scored and compared by the objective and comprehensive scoring criteria. Results　The scores of each practical step and total score in the experimental group were higher than those in the control group (P<0.05). The average total scores of the two groups were (90.18±1.97) and (83.70±3.68)

respectively. Conclusion　The task-based practice teaching mode can improve students' ability of completing radiotherapy dose measurement independently.