The utility model discloses a work platform of last removal of 800kV strain insulator string, support frame including 2 symmetry settings, being provided with the track in the support frame, being provided with first drive wheel, the second drive wheel of support track in the track, 2 first drive wheels on 2 support frames that the symmetry set up are connected through first transmission shaft, and 2 second drive wheels pass through the secondary drive hub connection, and first transmission shaft passes through gear drive with the secondary drive axle to be connected, and the upper end of 2 support frames is provided with takes the platform, still includes the motor, and the power take off of motor holds and is provided with worm gear, be provided with on the first transmission shaft with worm gear complex turbine. Work platform can move on 800kV strain insulator string, through the opening and close the removal that realizes work platform and stop of control motor, can move work platform to the position of the monolithic insulator that needs to be changed, be convenient for change the monolithic insulator.