The invention discloses a hydrogen power system based on a heat self-balancing solid hydrogen source reactor. The hydrogen power system comprises a hydrogen source, the heat self-balancing solid hydrogen source reactor, a hydrogen fuel cell, an air compression system and a vacuum pump; and an inlet of the heat self-balancing solid hydrogen source reactor is connected with the hydrogen source, an outlet of the heat self-balancing solid hydrogen source reactor is divided into two paths, one path is connected with the hydrogen fuel cell, and the other path is connected with the vacuum pump. According to the hydrogen power system, a phase-change material can store heat released by hydrogen absorption reaction in a latent heat form and release the heat during hydrogen desorption reaction, thus,heat in the hydrogen absorption process is used for the hydrogen desorption process, heating and cooling devices are omitted, the cost is reduced, the energy utilization rate is increased, and meanwhile, the hydrogen absorption and desorption reaction rate can be increased.