The invention discloses a novel intelligent straight travel electric executing mechanism. The mechanism comprises a direct current brushless motor, a switching power supply and motor driver, a tubular push rod nut component, a trapezoidal screw main shaft, a joint, a mounting flange, a supporting rod, an absolute encoder, a setting and selecting knob and a system display and control unit, wherein the direct current brushless motor is connected with the trapezoidal screw main shaft through a decelerating mechanism; the trapezoidal screw main shaft is connected with the tubular push rod nut component and converts gyroscopic motion into reciprocating motion; the joint is arranged at the front end of the trapezoidal screw main shaft; the direct current brushless motor and the switching power supply and motor driver are arranged in a shell; the mounting flange is connected with the shell through the supporting rod; the absolute encoder and the system display and control unit are arranged in the shell; and the setting and selecting knob is arranged on the shell. The executing mechanism has the advantages of greatly improving the accuracy of an output position of the executing mechanism by using absolute encoder technology and restarting the system after power failure without missing code, along with convenient operation.