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Abstract. The present development of precision agriculture is at the lower stage in Heilongjiang province, but it has taken effect in aspects of demonstration and extension. However there are many problems in the technology research and application, such as technology development lags, the key techniques supporting lags, the lack of "3S" technology service for agricultural application with independent intellectual property, the whole poor production conditions caused by the limited resource and the man-land conflict, the lacks of the agricultural funds and the higher level scientific researchers, the application difficulties between technique equipments of the high-tech content and the low cultural level of rural human resources, the inconvenient using of multifunction agricultural equipments for the dispersed land and complex landform and so on.The above problems have limited the development of precision agriculture seriously in Heilongjiang province. Therefore, we should take the effective ways as soon as possible, depend on the existing experiences, techniques and equipments, and put forward the development strategy in accordance with regional condition to speed up the development of precision agriculture. There are many concrete countermeasures such as using demonstration experiences and production research results at home and abroad, introducing technique idea and partial equipments technique to promote independent innovation, proceeding demonstration experiments in the area with suitable conditions to spread of the idea of "precision agriculture", supporting the sustainable development of agriculture by new techniques and new equipments, enhancing communication and cooperation between department and subject, emphasizing the research of application basis, increasing th`e related course of precision agriculture such as GPS, GIS, RS and sensor technique and so on in colleges and universities, especially in agricultural universities, enhancing the development and application of computer and internet in the agricultural field, and so on.

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A concave disc copying icebreaking snow sweeper has been developed for improving the work efficiency and clearing free rate of solid ice and snow, and meeting the rapidity and efficiency of solid snow removal. The machine can simultaneously complete five functions of crush, chop, lifting, scraping and pushing, which also can realize independent servo-copying and self-excited vibrations reduction drag avoidance functions. The structure and working principle of the concave disc copying icebreaking snow sweeper have been introduced. The optimal combination of operating parameters impact on the clearing free rate and efficiency has been determined. The combinatorial optimization test methods of quadratic regression orthogonal rotation center was adopted, the traveling speed, digging depth of the snow, the blade angle of concave, the travel angle of concave blade are made as impacting factors, snow resistance, the clearing free rate, the maximum volume of removing snow pack as the objective function, optimizing experimental studied on the impact of performance of the snow machine operating parameters. The results showed that: the effect of copying and crossing obstacle in machine is good, effectively solve the problem of low clearing free rate of solid ice, while the efficiency of snow removal has been improved. According to the principle of objective function: the smaller snow resistance, the higher clearing free rate, the maximum volume of snow pack, making each factor level interval as constraint optimization, when the snow resistance is smaller than 820N, the clearing free rate is greater than 96%, the maximum volume of snow pack is smaller than 612mm3, the traveling speed ranges from 6km/h to 9.7km/h, the blade angle of concave blade is 19~ 21°, the travel angle of concave blade is 12°~14°. The above operating parameters are the optimal combination of snow machines.

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