Abstract: The no load commissioning test should be conducted on an industrial back pressure steam turbine after manufacturing stage according to technology agreement, while there is a distinct difference between the commissioning tests of back pressure and condensing steam turbines from the aspects of process and scheme. Combined with an actual application, researches were carried out for the process and scheme of no load commissioning test of the back pressure steam turbine, and key and difficult points of actual commissioning test were analysed. This may serve as a reference for the no load commissioning test in similar back pressure steam turbines.