The invention discloses a detachable multi-shift elastic stress single sheet flange magnetic property testing clamp, comprising a main frame support, a main frame support cover plate, a fixed clamp plate at the testing sample end part and a flexible clamp head as well as a flexible clamp plate, a spring base, and a compression spring. The main frame support is provided with a plurality of different installation holes; and the interval distances among the installation holes match the stiffness coefficient of the compression spring. The left side main frame support and the right side main frame support penetrate from the two sides of the sample placing position and are fastened through the bolt at the front end. The lower main frame support is assembled to the left side main frame support and the right side main frame support through different bolt holes at the distal end; and the other end of the sample is at the front end part of the left side main frame support and the right side main frame support and is pressed tight by bolts through the use of the fixed clamp plate. The flexible clamp plate and the flexible clamp head clamp the other end of the sample. The distal end of the flexible clamp head penetrates the lower main frame support and is assembled to the spring base. The testing clamp of the invention can conveniently realize the loading of multiple horizontal elastic stresses. Through the friction force, the sample ends are clamped tight. Without opening holes at the sample end parts, the testing clamp can work conveniently and quickly.