Service fault positioning method under 5G network slice

The invention provides a service fault positioning method under a 5G network slice, and the method comprises the steps: calculating the fault probability of each network node according to the number of network nodes and the importance sequence of preset indexes; arranging the fault probabilities of the network nodes in a descending order, and taking out the fault probabilities of a preset number of network nodes arranged in the front according to the descending order to form a suspected fault set; selecting the same number of fault nodes from the suspected fault set each time and randomly combining to construct an alternative fault set, wherein the same number is increased from 1 to the preset number; and calculating to obtain an alternative fault set with the maximum interpretation capability, and setting the alternative fault set with the maximum interpretation capability as a determined fault set. Through adoption of the method and the device, the problems that the algorithm operation time is relatively lo