Abstract: In view with of the low quality and inefficiency of slurry treatment by artificial salvage in hydrogeological drilling，solids control equipment with complex structure，huge volume and extreme power consumption in oil field can not be directly transplanted for reference.Nowadays，most of the solutions are just moving from excavating sedimentation tank to making use of vibrating screen.Although there is a significant improvement of efficiency in slurry purification by this way，they still can not get rid of the shortcomings of occupying large area and causing severe pollution.In order to solve the above existing problems，a mechanical system of slurry treatment equipment is designed，which combines slurry making，mixing and purification. Combining two purification theory， i.e.，sedimentation and mechanical separation，the box body and vibration screen are assembled，making slurry transported， stored and screened through pipes；connecting the circuits of working parts like slurry pump，vibration screen，agitator and collecting them to PLC，remote automatic and semi-automatic control can be realized with control panel；optimizing the assembly structure of all components to achieve shortcut disassembly and assembly，loading and transportation.Aiming at the problems of low working pump pressure and icing of working medium in complex geological and climatic environments such as high altitude and extreme temperature in Qinghai Province，according to the requirements for environmental protection of green exploration in geological prospecting，an automatic mud circulation and purification device has been developed by adjusting the power of circuit components and adding temperature regulating equipment.The field test result show that the device can complete the mud purification cycle smoothly and efficiently in manual or automatic mode，the mud can be uniformly dispersed and stable in operation even while the processing capacity reach 60 m3/h under the field operating rules，and the total power of electric heating is below 32 kW without considering heating consumption.The study results further indicated that the device developed in this paper is suitable for the light and simple application of small scale construction such as engineering geological exploration，hydrogeology and water well drilling.

Key words: Green exploration, Mud purification, Automatic control, Mechanical system