This paper presents a multi-objective algorithm based on tissue P system(MO TPS for short) for solving the tri-objective grain dispatching and transportation. This problem can be abstracted to solve the tri-objective VRPTW. In the algorithm, the cells of the tissue P system are divided into two groups. The first group, consisting of only one cell, aims at approaching to the Pareto front by the intelligent algorithm with non-domination rule while second group, consisting of six cells, focuses on searching boundaries by the artificial bee colony ...