Granulation processing method for low-melt-index degradable material, and shaped body prepared thereby

A granulation processing method of degradable materials, comprising steps of:

• reducing a temperature of a screw for-multiple times and increasing a rotational speed of the screw during an extrusion, crystallization, and granulation process;
• wherein materials added in the granulation processing method of degradable materials include polyhydroxyalkanoates;
• the temperature of the screw is reduced at least two times;
• wherein, after the temperature is reduced to a first reduced temperature, the rotational speed of the screw is increased, the temperature is then further reduced to a second reduced temperature, and then a resultant material is subjected to extrusion for crystallization and granulation;
• the first reduced temperature is 10° C. below a melting temperature of the degradable material to 30° C. below the melting temperature of the degradable material, and the second reduced temperature is 60° C. below the melting temperature of the degradable material to 100° C. below the melting temperature of the degradable material.