The invention relates to an analytic technique of seismic data quality. The invention has the following steps: firstly, selecting control point common shot gathers data, determining the maximum analytical frequency, selecting and analyzing frequency band according to the range of the effective reflected signal frequency in a target block, carrying out frequency wave filtering to each seismic channel of the data each cannon to obtain the frequency demultiplication result of each channel; adopting a formula (1) to make time domain median filter to all seismic channels of each frequency band in each cannon to obtain the statistical energy curve results of each frequency band, drawing the statistical energy curve results of each frequency band in the same cannon on an identical chart to obtain a time-frequency analysis chart. The invention can quantitatively reflect the data quality of data control point rapidly and correctly, avoid errors in human analysis and obtain reliable results.