The invention relates to a mini combustion-type semiconductor thermo-electric generator, which belongs to the field of electronic devices. The thermo-electric generator orderly comprises an upper thermo-electric generating sheet (4), an upper thermal-isolating baffle (2), a combustor (1), a lower thermal-isolating baffle (3) and a lower thermo-electric generating sheet (5) from top to bottom, wherein the combustor (1) comprises a substrate (9), the substrate (9) is orderly provided with a gas inlet channel (7), a combustion chamber (10) and a gas outlet channel (6), and the gas inlet channel (7) and the gas outlet channel (6) are in a parallel structure; and the diameters of the gas inlet channel (7) and the gas outlet channel (6) vary. The invention aims at the field of personal combat cells, has the advantages of small size, light weight and high continuous operation performance, and is especially suitable to provide power for mini devices in the aspects of field, military affairs and aviation with no common power sources in the field of high technology.