A process cycle time determination method includes: performing processing to obtain a first dataset based on production process data and attribute data of a line body of a production line; performing two-dimensional matrix conversion on the first dataset to obtain a first matrix when there is a missing value in the first dataset; performing filling on the missing value in the first matrix by using the K-nearest neighbors model and the chain equation model of random forest to obtain a corresponding filling value; filling the filling value in the position of the corresponding missing value in the first dataset to obtain a second dataset; and determining a process cycle time of the target station of the target line body in the production process of the target vehicle type based on the second dataset.