This paper presents a high-resolution two-dimensional finite-volume numerical model with twoorder accuracy for flow characteristics at open channel junction. The governing equations of the model comprise the shallow water equations with bed slope and resistance source. A high-resolution numerical method governing equations, which may accurately capture shocks, is adopted. To alleviate the problems associated with numerical instabilities due to small water depths near a wet/dry boundary, the friction source terms are treated in a fully implicit way. Finally, the measured data for open channel junction is used in the present model. Results indicate that present model may well simulate the flow characteristics at open channel junction.