The invention discloses a method of synchronous trigger execution of parallel test tasks, and belongs to the technical field of test and measurement. The method of synchronous trigger execution of parallel test task establishes a control mechanism of a test process for the test tasks of various units under test (Unit Under Test, UUT) based on a synchronizer trigger, utilizes the property parameter setting of the synchronizer trigger and a function call to complete the pre-adjustment and setting of control options of the test process, when a user starts the UUT test tasks through an operating interface of the test tasks, all registered application programs of the UUT test tasks can be executed immediately. The method of synchronous trigger execution of parallel test tasks has the advantages that the delay of the execution time of the UUT test tasks is stable and settable and the UUT test tasks are not affected by the UUT parallel test number, and is particularly suitable for the demand scenario of synchronous execution of UUT test tasks.