The invention provides a control flow executing method based on a trigger instruction structure. The method comprises the following steps of 1, conducting initialization configuration; 2, obtaining triggering conditions of instructions according to the status of a processing unit and a triggering expression of the multiple instructions; 3, selecting the instructions conforming to the triggering conditions from the multiple instructions, the instructions conforming to the triggering conditions are divided into a preset number of sub-instructions through operators, transmitting bits for representing the control relationship between a preset number of operator instructions to the output control ends of corresponding arithmetic devices so as to select the executed control flow, and meanwhile sequentially distributing the preset number of sub-instructions to a preset number of arithmetic devices; 4, obtaining and outputting arithmetic results for representing the status of the processing unit when each arithmetic device executes arithmetic corresponding to the operators; 5, repeatedly executing the second, third and fourth steps until the circulation cut-off conditions are met. The method is good in real time performance and high in efficiency. The invention further provides a control flow executing system based on the trigger construction structure.
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