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Aiming at the difficulty of task chain generation when two EVTs work in parallel in the airport cargo area, a task chain generation algorithm based on ETV platform is proposed. This algorithm has a clear structure and easy to calculate the total running time. Aiming at the problem of premature maturity of particle swarm optimization algorithm, an improved shared fitness particle swarm optimization algorithm is proposed. Twenty percent of the particles are selected to be in the left-behind Shared radius, and other particles are re-initialized and iterated, when the global optimal solution of the algorithm tends to be stable. The simulation shows that, compared with the standard particle swarm algorithm and chaotic particle swarm algorithm, the Shared fitness particle swarm algorithm can effectively avoid the precocity, and the global optimization ability is stronger. The solution is better and more stable.