The invention provides a machine adjusting device for tool machining. The machine adjusting device for tool machining comprises at least one processor and a memory, wherein a plurality of modules arestored in the memory, and the plurality of modules are executed by at least one processor; the plurality of modules comprise a data collection module, a model establishing module, a parameter calculation module and a communication module, wherein the data collection module is used for collecting historical machine adjusting data of a tool machining device, the historical machine adjusting data comprises tool information in the machine adjusting process multiple times, corresponding machining parameters and tool size measuring values, the model establishing module is used for analyzing the historical machine adjusting data and establishing a machine adjusting model, the parameter calculation module is used for calculating machining parameters to be compensated through the machine adjustingmodel based on the tool information and the machining parameters of a target tool, and the communication module is used for sending the machining parameters needing to be compensated to the tool machining device so that the tool machining device can be used for machining the target tool according to the machining parameters needing to be compensated. The invention further provides a machine adjusting method for tool machining. According to the machine adjusting device and method for tool machining, the machine adjusting efficiency of tool machining can be improved.