Abstract: A windshield repair device including a base, several sucking disks connected with the base by several connecting rods, a pressurizing tank, a rotary bar and a plug block. The base is formed with a central axial thread hole and the pressurizing tank has a thread rod at one end for screwing into the thread hole of the base. The pressurizing tank further has an inner thread at a central section for engaging with an outer thread of the rotary bar. The plug block is plugged into a central hole of a bottom end of the pressurizing tank. When a repair liquid is filled into the pressurizing tank, the rotary bar is twisted downward in the pressurizing tank and a bottom end of the rotary bar is extended into a central hole of the plug block to compress the air therein, whereby the pressure of the air forces the repair liquid to evenly flow into every corners of the fissure.