Introduction　The　development　of　the　digital　economy　has　a　profound　impact　on　industrial　economics.　The　article　starts　from　the　perspective　of　industrial　organization　theory.　The　thesis　aims　to　analyze　the　industrial　development　of　the　digital　economy　and　its　three　structural　variables:　digital　manufacturing　industry,　digital　service　industry,　and　the　development　of　industrial　digitization　on　carbon　emission　intensity.Method　Based　on　the　data　of　Input-output　Tables　with　extended　tables　of　30　provinces,　this　paper　analyzes　the　industrial　development　of　digital　economy　and　its　three　structural　variables:　digital　manufacturing　industry,　digital　service　industry,　and　the　development　of　industrial　digitization　on　carbon　emission　intensity.Results　and　discussion　The　empirical　results　show　that:　1)　at　the　national　level,　the　development　of　China＇s　digital　economy　industries　has　a　suppressive　effect　on　carbon　emission　intensity;　2)　in　terms　of　spatial　effects,　the　development　of　digital　economy　has　significant　carbon　spillover　effects,　but　digital　industrialization　and　industrial　digitization　present　different　spatial　effect　results;　3)　from　the　analysis　of　regional　heterogeneity,　in　the　northeast,　central　and　western　regions,　the　direction　of　influence　of　digital　industrialization　and　industrial　digitalization　on　carbon　emission　intensity　is　consistent;　in　the　eastern　region,　the　development　of　digital　industrial　service　sector　and　industrial　digitalization　has　a　suppressive　effect　on　carbon　emission　intensity,　while　digital　industrial　manufacturing　sector　presents　a　pro-increasing　effect;　4)　Non-linear　relationship　analysis　shows　that　the　development　of　the　digital　industrial　manufacturing　sector　has　a　＂promoting　and　then　inhibiting＂　effect　on　carbon　emission　intensity.　Overall,　the　impact　of　digital　industry　development　on　carbon　intensity　exhibits　a　＂promoting　increase,　then　suppressing,　then　promoting　increase＂　trend.　In　conclusion,　the　findings　suggest　that　China＇s　digital　economy　industry　has　entered　the　low-carbon　development　stage.