Worktable of workpiece processing machine

A worktable of a workpiece processing machine, comprising:

• a first worktable having at least one first joining portion fixed in a track;
• a second worktable having at least one second joining portion slidably engaged in the track so as to permit said second worktable to move in the direction toward or away from said first worktable;
• at least one locking device having an arresting member having a first friction portion, an actuating mechanism engaged on said second worktable and connected with said arresting member to actuate said arresting member to move the second worktable toward or away from the first worktable,
• wherein said first worktable further has at least one stop block fixed in the track with a first friction portion which is engaged by said arresting member when said actuating mechanism is actuated to move the second worktable away from the first worktable and wherein when the arresting member is engaged against the stop block locks movement of the second worktable relative to the first worktable stops;
• and
• wherein said actuating mechanism is formed of an application rod, a linking rod, and a driven rod, said application rod being pivoted on said second work table, said driven rod being located in said track through a shaft sleeve, and one end of said driven rod being connected with said arresting member;
• wherein said linking rod is pivoted at both ends with said application rod and one end of said driven rod, said linking rod forming with said application rod an angle smaller than 180 degrees, said application rod being exerted on by an external force to swivel upward so as to cause said driven rod to be pulled outwards from said track by said linking rod, thereby actuating said arresting member to move into engagement with the stop block.