Abstract: Mining dump trucks undertake the main transportation task of coal, ore and other materials in open-pit mines, and are currently mostly driven by mechanical or electric transmission, among them: the problems of low transmission efficiency, high fuel consumption and serious exhaust gas pollution in the mechanical drive system, the electric drive system has the shortcomings of short mileage, long charging time and high maintenance cost. This paper combines the advantages of high efficiency and low energy consumption of hybrid technology and permanent magnet drive technology, and designs a new type of permanent magnet synchronous motor (PMSM) hybrid power mining truck using torque distribution logic threshold control strategy. Firstly, based on the XG130 fuel powered mining truck of XCMG Group, a series connected PMSM hybrid power mining truck was designed and developed, which uses a diesel engine as the power source and a parallel permanent magnet drive motor(PMDM) assembly as the core drive motor. It has five working modes: pure electric drive, diesel engine drive, diesel electric hybrid drive, driving charging and regenerative braking. A cross-coupling control strategy was designed to meet the power switching requirements of its drive assembly. Secondly, a power system operating mode switching control strategy based on torque distribution hybrid logic threshold value was proposed for the high-efficiency and low-energy design goal of PMSM hybrid mining trucks. The required torque and hybrid logic threshold value judgment conditions were designed. On this basis, a joint simulation model of the original mechanical transmission fuel mining truck and PMSM hybrid power mining truck was built using MATLAB/Simulink and Cruise software. Finally, in response to the harsh operating conditions of open-pit mines, dedicated cyclic testing conditions were collected and established for simulation requirements. These conditions were used as simulation boundary conditions for dynamic and economic testing at both the software simulation level and the HIL testing platform level. The results show that compared to the original mechanical transmission fuel model, the maximum climbing slope and maximum speed of the PMSM hybrid system at full load have been increased by 29.20% and 25.65%, respectively. The acceleration time from 0 to 30 km/h and the comprehensive fuel consumption per 100 kilometers have been reduced by 64.54% and 17.48%, respectively. The engine has better working characteristics, and the driving motor's working characteristics meet the expected results. The overall power and economy of the mining truck have been greatly improved, which helps to promote the development of open-pit mining transportation environment towards high efficiency, energy conservation, and green environmental protection.