Cutting tool for pearl mussels

The invention relates to a cutting-open tool for pearl mussels. The cutting-open tool comprises a tool setting block and a cutting tool body, wherein the tool setting block is fixed to the middle of the cutting tool body, an inverted-V-shaped bayonet is arranged at the bottom of the tool setting block, a cutting blade arranged on the cutting tool body is sleeved with the tool setting block through the inverted-V-shaped bayonet arranged at the bottom of the tool setting block, and two sides of the inverted-V-shaped bayonet arranged at the bottom of the tool setting block are screwed and compressed at the bottom of the cutting tool body through fixing bolts. According to the cutting-open tool, as the structure of the tool setting block is adopted, the tool setting accuracy can be improved, and the mussel cutting efficiency can be greatly improved; the problem of the requirement for tool setting during mussel cutting is solved; the cutting-open tool is used in cooperation with a full-automatic mussel cutting dev