The utility model provides a power supply unit of high -order fork truck video system of accurate contact with cushioning effect, power supply unit includes support and external power source seat, beequipped with the portion of charging on the external power source seat, the portion of charging is including bottom plate and second backplate, the second backplate is equipped with two orbed cavitysthat hold of circle, hold the cavity top and be equipped with the contact for uncovered form, inside the inlaying of cavity, hold with the electricity that connects of lower extreme including the contact jaw of upper end the contact, the contact jaw is cylindrical terminal, connect the electricity end to describe for the ball, realize the camera on its front fork the lithium cell can through withfork truck on external power source be connected and carry out the effect of charging, has saved artificially and to have carried out the operation of charging, the time of having practiced thrift tothe camera lithium cell to the normal work of camera has been guaranteed, simultaneously, guarantee also at the in -process that charges that the lithium cell can accurately dock with external powersource, realize automatic charging.