The invention discloses a compounded seed 
coating agent containing pyraclostrobin, thifluzamide and 
dinotefuran and application, and belongs to the technical field of 
pesticide. The pyraclostrobin is a 
strobilurin fungicide, the thifluzamide is a thifluzamide 
fungicide, the objects and the ranges of 
control diseases are different, and if the pyraclostrobin and the thifluzamide are mixed and matched, the synergism effect is achieved, resistance increasing of cotton 
rhizoctonia to the two fungicides can also be inhibited, and the control range of a compounded preparation is enlarged; the 
dinotefuran is a third-generation chloronicotinyl insecticide, as the structure is different, the 
control effect and the lasting period on pests such as cotton aphids, 
plant hoppers, leafhoppers, thrips and whiteflies are better than the 
control effect and the lasting period of a traditional chloronicotinyl insecticide such as 
imidacloprid; the pyraclostrobin, the thifluzamide and the 
dinotefuran have the 
advantage of being long in lasting period and are suitable for serving as effective constituents of the seed 
coating agent, cotton aphids and 
damping off in the cotton seeding stage can be controlled when seeds are stirred with the compounded seed 
coating agent, the aim that diseases and pests are controlled through once seed stirring is achieved, and meanwhile the 
pesticide using amount and the control cost for diseases and pests in the cotton seeding stage are greatly reduced.