In thispaper，the single -factor test was carried out with water(CK)as the control and different dilution timessolution of seaweedfertilizer(900，1200，1500，1800，2 100 times)，and the effects on plant growth and fruit quality of“summer black”grape were studied.The results showed that the treatment with 1 500 times solution natural seaweedfertilizer had significant effects on the growth of grapeplants，and its leafwidth，leaflength，petiolelength，new shootdiameter，and new shoot internode length increased.Grape fruit single-grain vertical diameter，sugarcontent，solublesolids and other quality factor indicators increased significantly；Grape singleweight，single spikeweight，yield per plantincreasedsignificantly，yield per 667 m 2 increased by about 15%.