Abstract: With the transformation of agricultural production to specialized division of labor and professional cooperation, agricultural professional services play an increasingly important role in agricultural production. The key to realize agricultural modernization is to understand the main demand of agricultural professional services and to systematically analyze the influencing factors. Based on the farmer behavior theory, this paper analyzed the demand of specialized crop growers for agricultural professional services and the influencing factors of demand by a binary logistic regression model in Heilongjiang Province. Results show that specialized crop growers had burning desires for agricultural professional services, especially agricultural information services, agricultural production materials supply services, and agricultural technology services with the rate of 56.88%, 56.61% and 54.76%, respectively. Some positive influencing factors include gender being male, education level, scale of farming labor force, scale of farmland, degree of land fragmentation, proportion of planting income, evaluation of existing services, serving as village officials, being a member of a cooperatives, and participating in agricultural training. Some native factors are age and holding a part-time job. Therefore, this paper provides the following policy suggestions: to innovate service supply channels, to focus on meeting the needs of the main body needing the services, to coordinate different suppliers of professional services, to consolidate the different farmers’ professional cooperatives, and to develop and improve the service functions of farmers’ professional cooperatives.