The invention describes an application of siRNA dual silencing complex for blocking tumorigenesis and spread. A combination of an oligonucleotide survivin-siRNA molecule and oligonucleotide VEGF-C-siRNA molecule is formed to create the siRNA dual-interference composition at a mass ratio of (0-2):(2-0). In this experiment, a chemically generated and modified oligonucleotide molecule was used to transfect a transplanted tumor and suppress tumorigenesis and its spread. The two siRNA interferences are used in antioncogene medication and cervical cancer. Here, BIRC5 is linked to cervical carcinoma.