The invention relates to a multisource-to-multi-target approaching testing method performed based on parallel symbols. The multisource-to-multi-target approaching testing method includes the steps that firstly, on the basis of safety-analysis-oriented intermediate language representation, input function source nodes and dangerous function sink nodes are detected and positioned; secondly, a set of calling paths from the source nodes to the sink nodes is analyzed through a program control flow diagram, and mapping relationships from the multi-source source nodes to the multi-target sink nodes are built; thirdly, the out-degree of the source nodes and the in-degree of the sink nodes are calculated according to the node pairs with the mapping relationships; finally, parallel task scheduling is achieved with the out-degree and the in-degree as the priority measurement bases so that multisource-to-multi-target approaching testing can be implemented. By means of the multisource-to-multi-target approaching testing method, the problems of the blindness and the low efficiency of traditional random path scheduling parallel testing are well solved, the key target covering hit rate is greatly increased, and software testing and analyzing efficiency is greatly improved.