The invention discloses a method for determining opening number of shared parking spaces in a parking lot of a residential area. The method comprises the following steps: 1) obtaining parking person information of the residential area; 2) establishing a parking facility use type logit model of each parking person in parking peak and flat peak period; 3) judging whether the parking person adopts shared parking; 4) determining fixed parking selection proportion in the parking peak and flat peak period; and 5) determining the number of shared parking spaces in the parking peak and flat peak period. The method can make full utilization of the shared parking spaces in the parking lot, and improves utilization efficiency.