简介：Atpresent,thereislesstheoreticalresearchandpracticalexperienceintheaspectofultrashallowseismicexplorationtothetargetlayersatdepthsofonlytensofmetersbothathomeandabroad.Seismicexplorationplaysanimportantroleinthelocationoffaultsandactivestructures,butthedepthdozensofmetersbelowthegroundsurfaceistheblindareaofanykindofdeepandshallowseismicexploration.Startingfromthepointofviewofdetectingurbanactivefaults,andusingrelatedtheoriesandmethodsofgeology,geophysicsandmathematics,thepaperdiscussesthepreconditionsforacquiringefficientultra-shallowseismicsurveyresultsincomplicatedgeologicalbackgroundsinQingdao.TakingtheQingdaoareaasanexampleinthispaper,westudythedepthconditionofQuaternarydeposits,andapply4-8stackingfoldstosatisfytherequirementtogettheexplorationresultswithhigh-resolutionandhigh-SNR.Preliminaryresultsrevealthatselectingapropersurveillancelayoutisoneofthekeystoacquireauthenticexplorationresultsinultra-shallowP-wavereflectionexploration.OurresultsalsoshowthatultrashallowseismicreflectionmethodindetectingfaultsintheQingdaoareahasgoodapplicationprospects.