Pre-bending bus bar roll bending machine

The invention discloses a pre-bending bus bar roll bending machine. A support is included. A first wheel mechanism and a second wheel mechanism are fixedly arranged at the two ends of the support. A third wheel mechanism driven by a first power mechanism and a fourth wheel mechanism which is opposite to the third wheel mechanism and is driven by a second power mechanism are arranged in the middleof the support. The fourth wheel mechanism is provided with a fourth wheel and a stay wire encoder which is in linkage with the fourth wheel. One side of a bus bar abuts against the first wheel mechanism and the second wheel mechanism firstly, then, the first power mechanism is started, the third wheel mechanism abuts against the other side of the bus bar, finally, the second power mechanism is started, and the fourth wheel mechanism abuts against the bus bar. When the bus bar runs to the position where bending is needed, the first power mechanism is started, the third wheel mechanism appliespressure to the bus bar, a