The invention discloses a hollowing-out device for lace fabrics with different sizes. The device comprises supporting legs, a worktable is fixedly connected to the tops of the supporting legs, a frameis fixedly connected to the top of the worktable, a hydraulic cylinder is fixedly connected to the top of the frame, and the bottom of the hydraulic cylinder penetrates through the frame and extendsout of the frame and is fixedly connected with a die base. According to the device, through the arrangement and cooperative use of the supporting legs, the worktable, the frame, the hydraulic cylinder, the die base, guiding grooves, an upper die block, guiding blocks, accommodating grooves, cylinders, pull rods, springs, clamping rods, clamping grooves and a lower die block, the problem that it isinconvenient for a user to replace an upper die block and a lower die block of an existing hollowing-out device is solved. The hollowing-out device for the lace fabrics with different sizes has the advantage of making the lace fabrics with different sizes; the lace fabrics with different sizes can be made, convenience is provided for the user to use the device, and the practicality of the hollowing-out device is improved.