For　quenching　steel　of　22MnB5　spot　welding　structure　was　analyzed　in　test.　Ultra-high　strength　steel　elastic　modulus,　Poisson＇s　ratio,　the　mechanics　properties　of　solder　joints　surrounding　and　hardness,　metallographic　observation　analysis　were　obtained　through　tensile　test　with　the　strain　gauge　measurements.　The　reasons　for　damage　of　the　structure　by　spot　welding　were　obtained　by　the　optical　microscope　analyses　of　solder　joints　of　fracture　appearance,　and　the　super-high　strength　steel　solder　structure　consisted　of　the　plastic　ring,　resistance　spot　welding　and　the　base　three　parts　preliminarily.　The　mechanics　changes　of　solder　joints　are　complex,　far　end　forced　may　first　damage　failure,　and　shows　the　stress　direction　of　the　plastic　ring　is　of　smallest　hardness,　the　connecting　part　produces　negative　bending　moment　after　stretching,　this　bending　may　make　the　welding　produces　a　small　rotation　angle.　©　2017,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.