Test section design,test techniques and test data processing are one of the key technologies of test research of CHF for non-uniform axial power shapes in rectangle narrow channel.However,the design of test section is critical for this test research.Therefore,it is very important to accurately design the test section for test research of CHF for non-uniform axial power shapes in rectangle narrow channel.Design method and result of CHF test section of rectangle narrow channel has been presented.During the test,the electric heating has been adopted,and the non-uniform heating has been realized by changing the wall thickness along axial direction.The Measurement and insulation method of the experimental assembly has also been described.