Today, nonlinear and harmonic loads have been extensively developed in electrical energy distribution grids. Nonlinear loads create harmonics in distribution grids. When condensing in distribution grids, we need to consider the inkjet flow harmonics to ensure that the capacitors used do not increase the harmonic distortion and consequently do not increase the losses caused by the harmonics. In this paper, the optimal location of fixed and switchable capacitors in harmonic distribution grids using the Crow Search algorithm (CSA) is investigated. Using the proposed algorithm, optimal location of capacitors to reduce losses and Improvement of the voltage profile is determined in two distribution networks of 15 and 34 bus standards of IEEE. The results of the algorithm used in this study are based on the results of other algorithms in references such as artificial bee colony (ABC), flower pollination algorithm (FPA), FA, and plant growth simulation algorithm (PGSA), and it is found that the results of the simulation indicate the efficiency and superiority of the pattern The proposed irritation is in comparison with other methods.