Shovel machine mechanism and mold locking device for injection mold

The invention provides a mold locking device which comprises a driving mechanism, a shovel machine mechanism and a sliding block. The driving mechanism is fixedly installed on a mold, drives shovel machines and fixes the shovel machines and the sliding block; the shovel machine mechanism comprises the first shovel machine and the second shovel machine, and the first shovel machine and the second shovel machine are symmetrically opened and closed; the sliding block slides on the mold and is provided with shovel machine grooves for containing the first shovel machine and the second shovel machine, and the first shovel machine and the second shovel machine are driven by the driving mechanism to be symmetrically opened and slide into the shovel machine grooves; and the mold is provided with a sliding groove allowing the sliding block to slide therein and limiting assemblies for limiting the first shovel machine and the second shovel machine which are opened, and the limiting assemblies are arranged on the two sid