Comprehensive　residual　stress　of　a　1500m3　liquefied　petroleum　gas　spherical　vessel　was　measured　and　analyzed　after　many　cracks　arised.　The　results　show　that　the　general　residual　stress　was　at　a　high　level　in　the　field　with　cracks　as　well　as　the　field　without　cracks.　Furthermore,　the　measurements　were　taken　at　the　same　place　to　evaluate　the　effect　of　the　heat　treatment　after　this　spherical　vessel　was　re-welded　and　the　integral　heat　treatment　was　performed.　Meanwhile,　the　measurement　to　the　stress　in　the　vertical　direction　with　X-Ray　was　finished　after　a　set　of　special　treatments　in　the　outfield.