Tester is united to plant die pull includes braced system, displacement sensor, a tension sensor, the angular surveying ware, braced system includes four vertical supporting rod, adjacent vertical supporting rod becomes a rectangle through horizontal bracing piece interconnect, wherein install the dead lever between two relative horizontal bracing pieces, the dead lever sets up with the horizontal bracing piece level of another root, and all install the fixed pulley on dead lever and the horizontal bracing piece of this root, it forms suspension system to install the stay cord on the fixed pulley, one of stay cord is served and is installed the fixing sleeve who is used for fixed plant, the other end passes through force sensor and is connected with drive arrangement, drive arrangement gives the stay cord pulling force along the stay cord direction, still install displacement sensor on the stay cord, the change of the pulling force size of plant is given to force sensor control stay cord, the displacement volume of displacement sensor control stay cord, force sensor and displacement sensor and computer link, the computer is stored the data of collecting and handle, install the angular surveying ware between vertical supporting rod and the diagonal bracing pole, can measure the angle of side slope, adjustment and follow -up test for whole device are provided the basis, the present invention has the advantages of simple structure, high durability and convenient use, can stably fix in the side slope, the experimental data is accurate, can more audio -visually obtain the tentation data of plant die pull test, it implements to be worth the large tracts of land to be promoted.