Abstract: At present, the underground trackless rubber-tyred vehicle in coal mines uses explosion-proof diesel engine or storage battery as its power source, which has many technical deficiencies and practical problems.For examples, the explosion-proof diesel engine drive system has serious exhaust pollution, high fuel consumption and low work efficiency, while the explosion-proof battery drive system has disadvantages of insufficient power and poor endurance.The hybrid power is a kind of environmental friendly and energy-saving driving technology which has been widely used in the field of passenger cars.If applied to underground trackless rubber-tyred vehicles, it may be able to better solve these problems.However, the research on the hybrid technology of mining vehicles is still limited, especially the lack of special research on the control strategy of underground hybrid driving system.On the basis of a full consideration of driving conditions and working characteristics of the power source as well as the underground environment, a fuzzy logic control strategy was designed for the drive system of underground hybrid trackless rubber wheel.Based on an established CYC_JX cycle condition of underground trackless rubber-tyred vehicle, the Simulink simulation module was constructed using redeveloped ADVISOR software.The simulation and comparative analysis of the fuzzy logic control strategy designed in this paper and the electric auxiliary control strategy widely used at present were carried out.Furthermore, based on a measurement and control system developed by LabVIEW, a platform of underground hybrid trackless rubber wheel car was used to carry out the bench test for verifying the simulation results.The results showed that compared with the electric auxiliary control strategy, the efficiency of most working points of the explosion-proof diesel engine and motor under the fuzzy logic control strategy was higher, the fuel consumption of a hundred kilometers is reduced by 11.18% and the contents of HC and CO in exhaust gas were reduced by 20.83% and 1.82%, respectively.The tendency of output speed, output torque of the explosion-proof diesel engine and motor and the SOC in tests were the same as those of the simulation results.The change of fuel economy and emission were within the ideal range, which verified the rationality of the designed control strategy.According to the working condition information and driving intention, the drive system of hybrid electric trackless rubber-tyred vehicle based on fuzzy logic control strategy could coordinate the energy flow between explosion-proof diesel engine and motor well.Its fuel economy, power performance and exhaust emission characteristics were superior to the electro-assisted control strategy.However, the fuzzy logic control strategy designed in this paper lacks a comprehensive consideration of working efficiency of the motor.In the future, the motor efficiency could be used as a constraint target for a further optimization of the fuzzy logic control strategy.