The invention relates to a connection clamping device for pulling a specimen to break. The connection clamping device for pulling the specimen to break comprises a base, a first positioning baffle plate, a second positioning baffle plate, a screw clamp, a first broken specimen non-stretch section bracket, a second broken specimen non-stretch section bracket, a first broken specimen stretch section bracket, a second broken specimen stretch section movable bracket, and a movable bracket guide positioning groove. The connection clamping device is applied in stretching tests in teaching, can simplify test operations and improve the test precision, and better solves the problems of large labor amount and low measurement precision existing in the mechanical stretching tests.