Cross-professional collaborative analysis method for urban rail transit platform door

The invention discloses an urban rail transit platform door cross-professional cooperative fault analysis method, which comprises the following steps: establishing a tree diagram according to fault nodes in a multi-platform system control process, representing a switch-related execution command judgment link of each system by a root node, representing a single system positioning link by a branch node, and representing a single system positioning link by a fault node; the leaf node represents a fault reason in a single system; related execution commands of switches in a plurality of platforms are stored in corresponding branch nodes, changes of various data indexes of relay states and electrical characteristic indexes in a single system are stored in corresponding leaf nodes, and the fault range is reduced according to the tree diagram when a fault occurs in the operation process of a platform door. A fault is located within a single system range. According to the method, signal professional data and platform