The step-by-step static computation method is a seismic exploration data near-surface static correction processing mthod. Said invention can overcome the defect of one-step method for computing static correction quantity, and proceeds from theory to research the difference of primary wave and reflcted wave in the static correction effect so as to implement step-by-step computation of static correction quantity, make quality monitoring measures of every step to ensure the static correction accuracy. Said invention adopts common-offset gather, common-shot-gather and common receiving point gather to monitor primary correction effect, and adopts common reflected point gather and stacked profile, etc. to monitor the reflected wave correction effect so as to raise procesing accuracy and working efficiency.