Abstract: Aiming at the problems of difficult parallel operation of excavation and support and imbalance of time proportion in heading face, in order to realize parallel operation and rapid support, a new temporary support device is designed, which has the characteristics of adjustable size, rapid response and timely support. The method of theoretical analysis and numerical simulation is used to study ; the structure design of the device is introduced. Taking the comprehensive excavation construction technology of a mine as an example, the process optimization is carried out, and a construction technology of partition parallel operation is proposed theoretically. Through the mechanical model of simply supported rock beam at both ends of the roof, the mechanism of temporary support of the device is analyzed. The supporting performance of the device is analyzed by structural statics. The results show that when the roof looseness range of the roadway is 0 ~ 3.30 m, the load required for the device support is 158.4 kN ; the maximum equivalent stress obtained by simulation is 57.37 MPa. At the junction of the lower end of the top beam of the device and the position of the ear seat, the maximum displacement appears in the middle of the upper end of the middle beam, which is 0.30 mm. The structural design of the device can meet the support requirements. This study can provide a useful reference for the parallel operation of rapid excavation, efficient support and safe production.