The tensile strength and deformation performance test of the Grouting Coupler  used for the JG/T398 -2012 steel bar connection was conducted using the HRJ-300kN / 600kN / 1000kN large-stroke universal tester. The tensile test space was greater than 1300mm. Complete the test of yield strength, tensile strength and elongation rate of Grouting Coupler for 12 ~ 40 mm reinforced joints.