The utility model discloses a dental bonding agent strength testing clamp. A guide rod is arranged at the front part of a connecting shaft; a bolt hole is formed in the side surface of the rear part of the connecting shaft; an upper sliding block and a lower sliding block sliding along the guide rod are fixedly connected with the guide rod; a rigid pull rod is fixedly connected at the upper part of the upper sliding block; a sample limiting groove is formed in a central line part of the upper and lower sliding blocks. The clamp has the advantages that with the combination of the connecting shaft of a universal testing machine and the universal testing machine, the cost is greatly lowered compared with the situation that a micro pull tester is used independently, and moreover the functions of the universal testing machine are expanded; a bonded sample is compressed by double nuts together with gaskets, so that the bonded sample does not need to be bonded on a testing table by using the bonding agent; when the bonded sample is cut, the flatness of a bonding surface is ensured, subsequently the bonded sample is directly cut into small pieces according to expected size, and the defect that the bonded sample has stress when being cut is avoided; the testing clamp is steady in clamping, convenient to use, simple in structure and very low in cost; due to adoption of the guide rod, the bonding strength testing result is more accurate.