The electromagnetic connection processes of Aluminum alloy pipes were studied in the paper. Experimental coil and poles were designed according to pipes’ initial size. Some electromagnetic connection experiments were carried out under gap and the number of grooves. The influences of systematic technological parameter to connection strength were investigated with tensile test. The gap of connection have a best value and less than or greater than the value will decline the connection intensity. With the numbers of grooves increasing, the growth rate of the connection intensity increased at first and then decreased. It means an optimal value. In the experiment four grooves made connection intensity an enough strength which is even greater than the material ultimate strength. Too much grooves made no sense.