The input of phosphorus (P) along with stemflow and throughfall is an important supplement for P loss in subtropical forest ecosystems, but the dynamics of these processes in different type of forests remain elusive. Here, based on field monitoring experiments in middle subtropical Cunninghamia lanceolata (Lamb.) Hook. Plantations and Castanopsis carlesii (Hemsl.) Hay. Secondary forests from June 2015 to August 2018, we assessed P concentrations of stemflow and throughfall among different forest types and seasons, and the associated controlling factors. The results showed that P concentrations of stemflow and throughfall in C. lanceolata plantations varied from 0.002 to 0.026 and from 0.003 to 0.024 mg/L, respectively, and those in C. carlesii secondary forests varied from 0.003 to 0.024 and from 0.003 to 0.031 mg/L, respectively, P concentrations of stemflow and throughfall varied significantly between forest types in summer. Stemflow P concentrations were higher in summer than that in winter, regardless of forest type. Throughfall P concentrations were higher during summer and autumn in C. carlesii secondary forests, but did not differ among seasons in C. lanceolata plantations. Rainfall amount of stemflow in both forest types significantly varied among different seasons, with an average of higher stemflow but similar throughfall in C. carlesiisecondary forests compared with C. lanceolata plantations. P concentrations were negatively correlated with water amounts of both stemflow and throughfall in C. lanceolata plantations, but positive correlations were found in C. carlesii secondary forests. Our results suggested that forest type that was represented by canopy structure and phenology features was an important controlling factor affecting rainfall P distribution in subtropical forest ecosystems, which could provide useful basal data for better understanding the dynamics of P along with hydrology process in forest ecosystems.