The invention relates to a hydrate saturation on-site rapid discrimination method and a processing terminal, and the method sequentially comprises the following steps: 1, presetting a multivariate function, and building a corresponding multivariate function intersection diagram under a rectangular plane coordinate system according to the multivariate function to obtain a hydrate saturation rapid discrimination chart; And step 2, acquiring a deep resistivity RT value and a sonic time difference AC value obtained from logging information acquired from a natural gas hydrate drilling well position, projecting the RT value and the AC value into a hydrate saturation rapid discrimination chart to obtain a projection position, and obtaining a hydrate saturation value according to the projection position. The method has the advantages that the method is used; The hydrate saturation can be quickly judged only by obtaining the value of the sonic time difference AC and the value of the deep resistivity RT from on-site logging data, a hydrate saturation quick judgment chart is adopted, specialized software is not needed for data processing, the hydrate saturation can be judged immediately on site, time is saved, and efficiency is extremely high.