TiNi　shape　memory　alloy　and　stainless　steel　were　bonded　by　transient　liquid　phase　diffusion　bonding　(TLP-DB)　with　AgCu　metal　foil　as　the　interlayer.　The　microstructure,　alloy　elements　profile　and　the　patterns　of　joint　were　analyzed,　while　the　microhardness　and　the　shear　strength　of　the　joint　were　investigated.　The　results　show　that　the　interface　zone　of　joint　is　composed　of　TiNi　transition　zone,　middle　zone　and　stainless　steel　transition　zone,　which　contains　Ti(Cu,　Ni,　Fe)　phase,　AgCu　phase,　TiFe　phase　respectively.　The　microhardness　of　diffusion　zone　in　both　TiNi　side　and　stainless　steel　side　wries　in　the　range　of　500-650　HV.　However,　the　microhardness　of　middle　zone　is　only　about　120　HV.　With　the　increase　of　heating　temperature　or　the　prolonging　of　the　holding　time,　the　shear　strength　of　joint　interface　increases　firstly　and　then　decreases.　The　highest　shear　strength　is　about　239.4　MPa.　The　fracture　occurs　at　diffusion　interface　between　TiNi　alloy　and　AgCu　interlayer,　and　the　joint　presents　a　characteristic　of　mixed　fracture　ductile-brittle　mode.