Manipulator arm, manipulator and carrying device

A manipulator arm, comprising at least one arm body for carrying a to-be-carried object, wherein the arm body is provided with a suction plate for sucking the to-be-carried object, and the suction plate is provided with a plurality of vacuum suction holes;

• wherein the plurality of vacuum suction holes are uniformly distributed in the entire suction plate;
• the arm body further comprises a vacuum cavity connected to the plurality of vacuum suction holes;
• and
• the arm body further comprises a plurality of channels each in communication the vacuum cavity;
• the plurality of channels are communicated with the plurality of vacuum suction holes in a one-to-one manner.