The generation and reconnection of magnetic flux ropes in a plasma irradiated by two Laguerre-Gaussian (LG) laser pulses with different frequencies and opposite topological charges have been investigated numerically by particle-in-cell simulations. It is shown that twisted plasma currents and hence magnetic flux ropes can be effectively generated as long as the laser frequency difference matches the electron plasma frequency. The reconnection of magnetic flux ropes occurs. Typical signatures of magnetic reconnection, such as magnetic island formation and plasma heating, have been identified in the reconnection of magnetic flux ropes. Notably, it is found that a strong axial magnetic field can be generated on the axis due to the azimuthal current induced in the reconnection of magnetic flux ropes. This indicates that in the reconnection of magnetic flux ropes, the energy can be transferred not only from the magnetic field to the plasma but also from the plasma current back to the magnetic field. This work opens a new avenue to the study of magnetic flux ropes, which helps in understanding the magnetic topology change, magnetic energy dissipation, plasma heating, and particle acceleration in solar flares, coronal mass ejections, magnetic confinement fusion devices, etc. 

磁通绳,磁重联