To investigate star-forming activities in early-type galaxies, we select asample of 52 star-forming S0 galaxies (SFS0s) from the SDSS-IV MaNGA survey. Wefind that SFS0s have smaller stellar mass compared to normal S0s in MaNGA.After matching the stellar mass to select the control sample, we find that themean S\'{e}rsic index of SFS0s' bulges (1.76$\pm$0.21) is significantly smallerthan that of the control sample (2.57$\pm$0.20), suggesting the existence of apseudo bulge in SFS0s. After introducing the environmental information, SFS0sshow smaller spin parameters in the field than in groups, while the controlsample has no obvious difference in different environments, which may suggestdifferent dynamical processes in SFS0s. Furthermore, with derived N/O and O/Habundance ratios, SFS0s in the field show nitrogen enrichment, providingevidence for the accretion of metal-poor gas in the field environment. To studythe star formation relation, we show that the slope of the spatially resolvedstar formation main sequence is nearly 1.0 with MaNGA IFU data, confirming theself-regulation of star formation activities at the kpc scales.