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Aiming at exiting problems of flowers and leaves as well as the nutrition loss by using the dry harvesting technology process in field for forage grass, the introduction for the wet harvesting technology process innovation and its advantages of forage grass in different views was gave, such as technological theory and technological process. And in order to provide technical support for forage grass dimension mechanization desiccation by using solar energy, one type of solar energy bale drying machinery was developed. It could work in solar automatism collection manner and dry the bale of moisture content in around 40%. Products could be directly baled and stored. The performance test of the equipment and the dry grass and wet harvest were experimented. The tested results were listed as follows: solar drying forage loss was less than or equal to 2%, finished bale moisture content was less than or equal to 17%. The collector efficiency of solar energy air was more than or equal to 50% and handling ability was more than 1t/h. 