The paper investigates impact factors of agricultural SMEs’ technological innovation by questionnaire on the survey of more than 100 agricultural SMEs of Wenzhou City of Jiangsu Province. It selects 14 major factors that influence agricultural SMEs’ technological innovation, they are capital source, enterprises culture, support from leaders, government policy support, effect of key research personnel, communication inside organization, enterprise strategy, technological development level, organization and coordination inside organization, related information acquisition capacity, external cooperation, association and communication with consumers, change of external market and incentive measures to research personnel. Putting there factors in introductionance ordering by scores, we find out comparatively big impact factors that influence agricultural SMEs’ technological innovation among them, they are technological development level, incentive measures to research personnel, capital source, government policy support and enterprise strategy. The paper also puts forward corresponding measures and suggestions: further enhance innovation consciousness and improve technological innovation level of agricultural SMEs; increase incentive measures, strengthen construction of talents team of technological innovation; express scientific research strength of local scientific research institutes and agricultural institution of higher learning, realize integration of industries, universities and research; sound government guiding and pushing mechanism, improve new policy environment of agricultural SMES’ technological innovation.