The earth observation satellite(EOS) scheduling has problems such as complex constraints and difficulty in solving. For multi-orbit scheduling problem of the single EOS, this paper first describes the EOS scheduling process., and then Markov decision-making process is adopted to model the satellite scheduling process. The Actor-Critic(AC) algorithm is used to construct and train the scheduling decision-making model and the multistep estimation is used to calculate the advantage function. The experiment results demonstrate the satisfying efficiency, effectiveness and generalization ability of the suggested approach.