A portable electric power line crossing support includes a vertical rod, a fixed pulley disposed on the upper portion of the vertical rod, two baffle rods which are positioned on two sides of the fixed pulley and are arranged in a V shape. The portable electric power line crossing support is characterized in that a fixed ring is disposed on each of the rod body at the upper end and the rod body at the lower end of the vertical rod; and two ends of a binding rope are movably linked to the two fixed rings. With the added upper and low fixed rings on the ring wall of the vertical rod, the vertical rod and be positioned on the lower line side conveniently through the binding rope. The Portable electric power line crossing support is characterized by simple structure, convenient operation and high practicality. In addition, with sleeves which are capable of axial positioning and radial free rotation added onto the two baffle rods, no cable jumps occur during a line guiding process. And even if the phenomenon of cable jumps happens, the cable can slide back to the fixed pulley rapidly, so that an operator can carry out the line guiding operation in a time-saving and labor-saving manner.