The lawn will be significant degradation after planting four years in Daqing city,soil fertilization can improve the nutritional status and effectively delay the degradation process of the lawn.The test used soil testing and formula fertilization mode to study Poa pratensis L. growth variation.The results showed that:All fertilization treatments organic matter reduced amount was less than control and NPK content were higher than the control and pH values was lower than the control in final test; The treatment with nitrogen and phosphorus tiller density was significantly higher than other treatments in 7～10 months; The 50% fermented soybean cake treatment leaf width maximum and nitrogen treatment followed in 6～7 months and nitrogen and phosphorus treatment followed in 8～10 months; Nitrogen and phosphorus treatment chlorophyll content highest that promote chlorophyll content increased was best;Nitrogen and phosphorus treatment turf cover highest that significantly higher than the control and 50% fermented soybean cake treatment followed in the growing season;Nitrogen and phosphorus treatment could significantly promote the growth of Poa pratensis L.and 50% fermented soybean cake treatment followed.Comprehensive analysis that with nitrogen and phosphorus to promote the growth of Poa pratensis L. was best and 100% fermented soybean cake treatment was worst and fermented soybean cake treatment application ratio of not more than 50%.