The invention provides a scalable force and electric field transmission electron microscope in situ sample rod which comprises a coarse adjusting device, a signal adapter, a sample rod shell, a coarse adjustment adapter, a switching fixed rod, a coaxial ring, a transmission rod, a piezoelectric ceramic holder, a sample rod head, a piezoelectric ceramic tube, a fixed part, a needle fixed device, a conductive needle tube, a conductive electrode, a nano tip and a test electrode. Test and the control signal lines are inserted into the signal adapter, the electrical control connection of an external control testing module and the piezoelectric ceramic tube, the nano tip and a sample is realized. After the sample rod is inserted into a transmission electron microscope, the coarse adjusting device is controlled to accurately move the nano tip to the fine adjustment range of the sample, through adjusting the driving signal of the external control testing module, the in situ deformation of the piezoelectric ceramic tube is controlled, thus the nano tip is controlled to accurately move in a nano level in a fine adjustment range, finally the mechanical and optical contact of the nano tip and a testing sample is realized, and a force and electric performance in situ experiment is completed.