Abstract: The field experiment is designed in single factor randomized block,and studied effects on playgoskite to the biological characteristics of Medicago sativa L.Results showed that playgoskite can increase the yield and improve quality of Medicago sativa L.,when it is used in scopes 750 kg·hm^-2~3 000 kg·hm^-2.And the yield is the highest,plant is the highest too,when it is added 3 000 kg·hm^-2.And the yield is increased by 41.72%(p<0.01)compared to the CK.And contents of crude protein and lysine are also the highest,so the quality is most superior too.This studying conclusion provide important theoretical basis and guiding significance reasonably in the manure's foundation matched playgoskite and employing N,Pand K of cultivation of Medicago sativa L.