The utility model relates to a turning device, aims to provide a firm and wear-resistant rotary table, and discloses a rotary table of a tunneling machine. The rotary table of the tunneling machine comprises a rotary table body, four rotary oil cylinder pin shaft holes and two working arm pin shaft holes are formed on the rotary table body, two of the four oil cylinder pin shaft holes are formed in the upper end surface of the rotary table body, and the other two are formed in the front end surface of the rotary table body; the two working arm pin shaft holes are formed in the front end surface of the rotary table body and above the two oil cylinder pin shaft holes formed on the front end surface of the rotary table body, and alloy steel sleeves are embedded in the four oil cylinder pin shaft holes and the two working arm pin shaft holes; and a self-lubricating bushing is embedded in each alloy steel sleeve. The rotary table of the tunneling machine has the advantages that the working arm pin shaft holes and the oil cylinder pin shaft holes, which are easy to be abraded, are embedded with alloy steel sleeves and self-lubricating bushings, the wearing resistance is improved, and the maintenance frequency is reduced.