Abstract: In order to research the reduction effect of natural marsh wetlands around paddy fields on the nitrogen and phosphorus in the drainage of paddy fields, the research on the interception and purification of nitrogen and phosphorus in the drainage of paddy fields by wetlands in the western region of Jilin Province was carried out. The research results show that the wetlands around the paddy fields can effectively purify paddy field drainage with TN concentration of 7.82 mg/L and TP concentration of 0.93 mg/L, reducing TN and TP concentrations by 69.95% and 68.82%, respectively, the removal rates of the total amount of TN and TP reached 80.73% and 79.72%, respectively. Among the four main wetland plants in the local area-Typha orientalis, Typha minima, Phragmites australis and Bolboschoenus platyphylla, the specific root length of Typha orientalis and Phragmites australis was significantly higher than that of Typha minima and Bolboschoenus platyphyll, and the glutamine synthetase activity of Typha minima was significantly higher than that of the other three wetland plants. There was no significant difference in the amount of nitrogen accumulated per unit dry matter among the four plants.The amount of phosphorus accumulated per unit of dry matter among Typha orientalis, Typha minima and Phragmites australis was not significantly different, but the amount of phosphorus accumulated per unit of dry matter in the roots of the three was significantly lower than that of Bolboschoenus platyphylla. The amount of phosphorus accumulated per unit dry matter in leaves of the three was higher than that of Bolboschoenus platyphylla. The utilization of natural marsh wetlands around farmland can effectively remove nitrogen and phosphorus from the drainage of paddy fields, featuring low cost and generalizability. It can provide case references for the reduction of nitrogen and phosphorus in farmland drainage in the same type of areas.