Abstract: In this article, the effects and mechanisms of SNP-9 on Parkinson''s disease (PD) cell model were investigated.SH-SY5Y cells were treated with rotenone to establish PD cell model; the effects of rotenone and SNP-9 on cell viability were detected by MTT assay; Hoechst/PI double staining assay was used to detect the effects of rotenone and SNP-9 on cell apoptosis; DCFH-DA probe was used to detect the effects of rotenone and SNP-9 on cellular reactive oxygen species (ROS) levels; and Western blot was used to detect the effects of rotenone and SNP-9 on protein levels of tyrosine hydroxylase (TH), α-synuclein (α-syn), Bcl-2 and Bax.The results showed that SNP-9 could alleviate abnormalities in cell viability, levels of TH and α-syn, apoptosis, ROS and apoptotic relative protein Bax/Bcl-2 induced by rotenone.Our findings suggest that SNP-9 may alleviate rotenone-induced injury in neuronal cells by regulating cell apoptosis related pathway.