Emission fluxes of phosphine in intertidal zone for aquaculture along the northern Jiangsu coast were investigated using static chamber method and concentrations of phosphine were analyzed by gas chromatography coupled with a nitrogen-phosphorus detector. Besides, the seasonal and spatial variation characteristics were studied and the environmental factors were measured to explore the influences on phosphine release. The results showed that the emission fluxes were relatively higher in August, followed by May, November and February, with the ranges of 16.5-168.9, 8.3-105.9, 8.2-64.5 and-19.5-49.6 ng m^-2 h^-1, respectively. Also, obvious spatial difference of phosphine emission fluxes at the study area was observed, which indicated that the highest emission fluxes were monitored at station b10, followed by b3 and the lowest were found at b5 and b8. In addition, it was found that phosphine emission fluxes were significantly positively related to TP, IP, OP, OC, TN, SC, T and negatively related to Eh, with the correlation cofficient of 0.807, 0.579, 0.828, 0.825, 0.467, 0.605, 0.551 and-0.774. It is inferred that high phosphorus, carbon, nitrogen and sulfide contents, high temperature and reductive conditions are favorable for the release of phosphine.