The droplet spreading and deposition appear widely in industrial applications, and it is of practical significance to study the effect of non-Newtonian rheology on droplets impact on solid surfaces. In this research, we developed a two-phase lattice Boltzmann model based on the phase field method for power-law fluid flows. By introducing a contact angle condition, power-law droplets impact on solid surfaces was investigated, and the effects of power exponent n (0.5 ≤ n ≤ 1.0) and Weber number We (5 ≤ We ≤ 45) on shear-thinning droplets impact were evaluated. The results indicate that power-law liquid inhibits the droplet spreading and splashing, and it becomes easier for deposition with the decrease of n. In addition, droplets are easier to reach stationary state as weber number increases.