In quantum mechanics,it is very important to calculate the commutation relation between two mechanical quantum op-erators.Some important principles and conclusions are related to the two operators,such as whether the two mechanical quan-tum operators can have a common intrinsic system or two mechanical quantum operators whether the two operators have direct correlation with the two operators.There are two methods to calculate the commutation relation between the two operators,di-rect calculation and state calculation method.Two methods are used to calculate the commutation relation of the oper...