The soil parameters that effect phase velocity of Love wave are compared; and it is feasible using phase velocity of Love wave to determine shallow shear wave velocity profile of the site by virtual inversion. The first mode phase velocity of Love wave estimated from three-component microtremor array records is chosen as the object function

the shallow shear wave velocity profile of the practical site is inversed by means of a hybrid approach of genetic algorithm and simplex in two typical conditions and are compared with those determined from PS logging data; and it shows that it is a feasible technique using phase velocity of Love wave estimated from microtremors array to determine the shallow S-wave velocity structure of engineering site.