Abstract: 【Objective】 Pollination biology of Tamarix karelinii Bunge(Tamaricaceae). 【Methods】 Tamarix karelinii Bunge was used as the research object, and the morphological characteristics of flowers, flowering dynamics, pollinating insect species, and their pollination behaviors were recorded through field observations, the sugar content of nectar was measured by centrifugation, pollen viability was determined by the TTC method, receptivity of stigma was determined by MTT method, and the pollen carrying capacity of pollinators was counted by microscopic counting. 【Results】 The population of Tamarix karelinii Bunge had a flowering period about 58 days and a single flowering period was 3 days.During the flowering period of a single flower, both pollen and stigma were active, and their activity was the highest on day of flowering.The Apis mellifera, Lasioglossum albescens, Eristalis tenax, Eupeodes corollae and the Lucilia sericata were the main pollinators, with the Lasioglossum albescens having the highest flower-visiting frequency, the Apis mellifera an absolute advantage in terms of the number of individuals, single flower stay time and pollen carrying capacity; The sugar content of nectar was the highest during 14:00-16:00 of the day, which coincided with the peak of flower visitation by pollinators as mentioned above. 【Conclusion】 T.karelinii has floral syndromes adapted to insect pollination, and the generalized pollination system is suitable for Hymenoptera and Diptera insects to pollinate it, among which the pollination ability of Apis mellifera is more significant.