In this paper, based on the traditional wireless strain testing technology, a wireless dual-core stress testing device is designed to solve the synchronization problem of wireless network from the hardware architecture. The equipment is mainly composed of three parts: measurement circuit, data processing unit and radio frequency unit. The radio frequency unit uses an independent data processing module to form a dual-core system with an external data processing module. When synchronizing data acquisition, the clock in the radio frequency unit sends pulse signals directly to control the acquisition circuit, which greatly reduces the time delay and improves the synchronization accuracy of data. This paper mainly discusses the principle of strain measurement, wireless strain acquisition device, acquisition circuit, dual-core data processing circuit and the realization of the final product. Finally, the stress test is carried out in the process of opening and closing the gate support arm with this equipment. The test results show that the equipment fully meets the requirements of engineering test, the system performance is stable, the measurement accuracy and synchronization accuracy are high.