Large-size tool leveling system and method thereof

The invention provides a large-size tool leveling system and method. The large-size tool leveling system comprises a plurality of lifting assemblies, a plurality of reference parts, a detection part and a controller. The lifting assemblies can be adjusted in a lifting mode, the multiple lifting assemblies are supported at the bottom of the tool truss, and the multiple reference parts are arranged in the multiple reference holes of the tool profile correspondingly. The detection part is used for detecting the actual coordinate information of the reference point on each reference part; the controller is in control connection with the detection piece and is in communication connection with the lifting assembly, and the controller is used for obtaining a vertical deviation value of each datum point according to the actual coordinate information and the theoretical coordinate information of each datum point, obtaining a height adjustment value of the lifting assembly needing to be adjusted according to the vertica