Taking 4-year-old Prunus humilis in Changbai mountain as material,the effect of GFMP application period and fertilization amount on the yield and quality of Prunus humilis were studied.The results showed that application period and fertilization amount had close relationship with the sugar content，acid content，sugar-acid ratio，fruit weight，yield per plant of Prunus humilisfruits；the effects in improving the yield and quality of Prunus humilis when spring 250 g/plant GFMP in the sixth week after becoming flowers was the most obvious.Spring 300 g/plant GFMP in the thirtieth day before fruits ripening had some functions in improving the yield and quality of Prunus humilis，but the integrated indicators and fertilizer efficiency utilization of the fruits were worse than spring 250 g/plant GFMP in the sixth week after becoming flowers.