Abstract:2020 is the great year of Mars exploration. Several countries have successively launched their own Mars probes at the launch window. Up to now, the countries that have successfully caught up with the launch window are the United Arab Emirates, China and the United States. This paper presents the ‘pork chop’ energy diagram of Mars exploration launch and arrival window in 2020. In terms of payload, launch window, launch vehicle, the Earth to Mars transfer orbit, captured by the Mars orbit and landing, communication and so on, the probes launched by the three countries are compared and analyzed, and the relevant parameters of each section of the missions to Mars are given.