The utility model discloses an explosion -proof torquemeter, it includes manages pressure sensor hydraulic pressure tail jar with the oil jacket and is connected, produced pressure signal when just being used for gathering the connection of oily casing thread, photoelectric encoder is connected produced displacement signal when just being used for gathering the connection of oily casing thread with oil jacket pipe front idler wheel, control is connected with pressure sensor and photoelectric encoder electricity according to box, one end, and the other end is connected with integrated circuit board, integrated circuit board is equipped with the singlechip on it, the singlechip is used for converting pressure signal and displacement signal two kinds of data signal to and transmitting the computer, and the computer, installing moment of torsion monitored control system on it, moment of torsion monitored control system is used for carrying out operation to two kinds of data signal, form the moment of torsion the number of turns time course to the demonstration is on the computer screen. The utility model discloses can carry out the control of real -time moment of torsion to regular screw thread sleeve pipe and special screw thread bushing's tightening torque.