In this paper, a multi-valued cellular automata model for mixed non-motorized traffic flow is proposed and the simulation results are studied. The mixed non-motorized traffic flow is mainly composed of bicycles and tricycles in Chinese towns. According to the fact that bicycles and tricycles have different sizes, a bicycle is assumed to occupy one unit cell space and a tricycle two units of cell space. The simulation results show that: In the system with slow bicycles and tricycles, the ratio and the first moving probability of tricycles do not affect the flux, however, the first moving probability of tricycles will impact on the average velocity of bicycles and tricycles. In the system with fast bicycles and tricycles, the multiple state effect appears both in free flow and congested flow regions under the deterministic case, and it disappears when the fast bicycles has the randomization effect.