A turnover machine for production of sleepers aims to solve the technical problems that in the turnover process of a conventional turnover machine, potential safety hazards exist because sleepers have high possibility of falling out, being damaged or even hurting people. According to the technical scheme, the turnover machine comprises racks, transversally moving devices, lifting devices arranged on the transversally moving devices, and turnover devices connected with the lifting devices; each turnover device comprises a motor reducing gear arranged on each transversally moving device and a turnover frame connected with each motor reducing gear; the key point is that the turnover machine further comprises protective devices; each protective device structurally comprises a protective rack hinged to one end of each turnover frame, and a protective oil cylinder hinged to the other end of the turnover frame; the other end of each protective oil cylinder is hinged to each protective rack. The turnover machine has the technical effects that the protective racks are utilized to block the sleepers so as to effectively prevent the sleepers from falling out in the sleeper mould turnover process, thereby improving the quality and the production efficiency of the sleepers and eliminating the potential safety hazards.