The conformation of star comb-like polymer chains in dilute solutions were investigated using Brownian dynamics simulations. The results show that when the grafting density of the star comb-like chains is less than 0.2

the conformation is star-shaped. With the increase of the grafting density

the conformation gradually changes to spherical. In addition

the stretching factor can also better reflect the conformational transition from star to spherical shape. The length of the side chains less influences the stiffness of the star comb-like chain backbone

but its grafting density influences it more. As the length of side chains increases

the persistence length of side chains increases accordingly

but the relative rigidity strength decreases with the increase in side chain length. This paper reveals the relationship between conformation and molecular parameters of star comb-like polymers in dilute solutions

which helps to facilitate relevant characterization studies.