Neutrinos are microscopic particles. When they propagate in crystals, coherent scattering will occur, which will greatly improve the probability of scattering.Some calculations show that the cross section of the interaction between neutrino and crystal is directly proportional to the 4 / 3 power of the number of particles in the scatterer (crystal). That is to say, the larger the crystal is, the more particles it contains, the larger the interaction cross section between neutrino and crystal.As we all know, there are a lot of crystal materials in the interior of the earth, in which the inner core is said to be the largest crystal with a diameter of 1200km. Can the solar neutrino interact with the giant crystal in the interior of the earth to form a significant thermal effect?Here, we calculate the thermal effect of the coherent scattering of the solar neutrino and the crystal matter in the earth according to the crystal distribution in the earth. The results show that when the crystal share of the earth reaches a certain proportion and the crystal size reaches kilogram level, the energy released by the interaction between the solar neutrino and the crystal material of the earth can reach 12.39-42.02tw, which may be the source of unknown energy in the earth.