The invention discloses a visualized and dynamic testing rule creating method oriented to parallel tests of a safety demanding system and belongs to the field of system testing. The method includes defining an isomorphic storage data structure of a type tree of a five-grade structure for all type tests of the safety demanding system; creating a current type tree and a comparison type tree according to the type tree; performing type tree copying or single node copying according to test needs; when nodes in the comparison type tree are added into the current type tree, judging whether homonymic nodes positioned under same subsystem nodes or test item nodes and identical in logic relation exist or not, wherein as for the homonymic nodes, re-adding is not performed. In the method, node operations on the current type tree are all recorded in a buffering area, and redundancy eliminating operation is performed before the node operations are submitted to a database. By the method, a universal storage structure for multi-type tests is designed, so that compiling time of testing rules and workload of testing personnel in multi-type spacecraft tests are reduced, and testing efficiency is improved.