Threatened abortion (TA) is a common complication with high incidence in the first trimester of pregnancy, which will end in miscarriage if not treated properly. The Chinese herbs Cuscutae Semen (Tusizi in Chinese) and Herba Taxilli (Sangjisheng in Chinese) first recorded in the ancient classic medical book Shennong Bencao Jing are effective and widely used as an herb pair for the treatment of TA, while the active ingredients and the functional mechanism of Tusizi‐Sangjisheng herb pair treating TA are still unknown. In order to exploit the relationship between those two herbs and TA, systems pharmacology analysis was carried out in this study. A total of 75 ingredients of Tusizi‐Sangjisheng were collected from Traditional Chinese Medicine System Pharmacology Database and Analysis Platform (TCMSP). 12 bioactive compounds were screened, and 153 directly related targets were predicted by systematic models. Besides, Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis were used to systematically explore the potential mechanisms of Tusizi‐Sangjisheng treating TA. Meanwhile, Compound‐Target (C‐T), Target‐Disease (T‐D), and Target‐Pathway (T‐P) networks were constructed to further quest the underlying functional mechanisms of Tusizi‐Sangjisheng. As a result, 31 targets and 3 key pathways were found to be directly related to TA that includes mitogen‐activated protein kinases (MAPKs), phosphatidylinositol‐3‐kinase/protein kinase B (PI3K‐Akt), and transforming growth factor‐β (TGF‐β) signaling pathways. The results in this study may provide some valuable clues about the molecular mechanisms of the efficient Chinese herb pair Tusizi‐Sangjisheng in the treatment of TA.