Hollow plaster mold box

The utility model discloses a hollow plaster mould box, particularly relates to plaster mould box field, including upper cover plate, the front end of upper cover plate is fixedly connected with locking mechanism, the locking mechanism includes hollow column, return spring, connecting column, pull rod, stop collar, slot and bolt, the lower surface of hollow column is fixedly connected with return spring, connecting column, pull rod, stop collar, slot and bolt. The lower surface of the reset spring is fixedly connected with a connecting column, then a user pulls a pull rod upwards at first, then the connecting column is pushed to move upwards, and then the reset spring is stressed. And finally, a reset spring is subjected to pressure retraction and then drives a plug pin to move upwards, an upper cover plate is attached to a lower cover plate, then a user slowly exerts force, a pull rod slowly moves downwards, then the reset spring slowly resets, and finally the plug pin is pushed to slowly move downwards from