A semiconductor mixed material and manufacturing method thereof, a thin film transistor and an electronic device are provided. The semiconductor mixed material includes an inorganic semiconductor nanoparticle and an organic semiconductor material, and the inorganic semiconductor nanoparticle is dispersed in the organic semiconductor material. The embodiments of the present disclosure ensure both a high electron mobility and a high charge transfer rate by mixing the inorganic semiconductor nanoparticle with the organic semiconductor material.