[Objectives]  To identify the species of flower-visiting insects in the meadow steppe of the eastern Tianshan Mountains, and investigate their flower visiting behavior, in order to better protect these species and the essential pollination services they provide to various plant resources in this grassland region. [Methods] The relationship between local flower-visiting insects and flowering plant species was investigated from June to August 2021 using sweep nets, visual inspection and videography. [Results]  Thirty-three species from 17 families and 5 orders of flower visiting insects were identified, of which the main orders were the Diptera, Hymenoptera and Lepidoptera. Flowering plants visited by these insects included 15 species in 8 orders, and 9 families. Apis mellifera was the main pollinator of Potentilla supina, whereas Syrphus nitens was the main pollinator of Cnidium monnieri and Colias erate was the main pollinator of Cirsium japonicum. The peak of daily activity of these three flower-visiting insects is between 12:00 and 14:00. During this period, the average frequency of Apis mellifera visits to P. supina was (9.43 ± 2.27), with most visits recorded when 7 flowers were visited. The average visit duration to a single flower was (6.71 ± 1.45) s. The average frequency of S. nitens visits to C. monnieri flowers was (5.30 ± 1.23), the highest frequency was recorded when 4 flowers were visited. The average duration of a visit to a single flower was (13.79 ± 3.40) s; The average frequency of visits of C. erate to Cirsium japonicum was (1.58 ± 0.13), the highest frequency of visits was recorded when just 1 flower was visited. The average duration of a visit to a single flower was (10.42 ± 2.90) s. [Conclusion]  Flower-visiting insects and types of flowering plants in the eastern Tianshan Mountains will change over time. The abundance of pollinating insects in this grassland region can be improved by increasing the corresponding host plant resources. Reasonable use of the behavioral characteristics of different flower-visiting insects can be made to pollinate specific plant resources.