Abstract: The tensile and flexural properties of shrub roots are the key and foundation to study the mechanism of soil fixation of shrub roots in windblown sand area.In order to make the results of tensile and flexural mechanical parameters of roots closer to the actual situation, in-situ test is usually carried out in the field.A set of in-situ tensile and flexural testing device for shrub roots was designed to solve the problem of bad in-situ testing environment.It includes mechanical parts and electronic parts.Mechanical components are composed of rack, clamp and electric pull rod; electronic components are composed of nRF24 L01 wireless transmission module and STM32 F103 chip.The real-time short-range wireless transmission of test data is realized by hardware circuit and software program.After manufacturing, debugging, calibration and inspection, the test device can obtain tensile and bending resistance and displacement parameters in situ of shrub roots, and transmit them to PC in real-time and short-range wireless, realizing kinetic energy such as display, storage and historical data query, meeting the use requirements of field in situ test of shrub roots, and providing field data support for exploring sand control and soil consolidation of shrubs.