The invention belongs to the technical field of power engineering and particularly relates to a substation main grounding grid parameter automatic checking and reviewing assistance system, in particular to an assistance system for quickly reviewing and automatically checking a substation grounding grid. The system comprises data interface filling, output value feedback, grounding body section output, voltage step potential contact, shunting coefficient allowed value calculation, deep well-surface connection, grid side length percentage calculation, parallel value calculation, selection correctness judgment, large soil resistance value judgment, handle-type enclosure arrangement, application calculation table judgment and grid spacing calculation. Through the system, review depth requirements are completely met in special projects of substation grounding grid construction, expansion and reformation, a selected substation main grounding grid material section and the quantity of main grounding grid materials are calculated quickly and effectively, the substation grounding grid arrangement mode is judged accurately, the reported grounding material quantity meets economical and technical rationality requirements, and review efficiency is improved.