The invention discloses a 
new energy tensioner and a working method thereof and relates to the field of tensioners. At present, a tensioner used in construction of line stringing under tension in 
transmission line engineering basically adopts a 
diesel engine as a power, the equipment 
noise is large, the environment is polluted, the engine is relatively high in maintenance cost and relatively poorin economy, and the field diesel filling easily causes 
pollution at the same time. For the 
new energy tensioner, by fully utilizing the characteristic that a tensioner mainly focuses on passive worksand adding a power generator, a 
power battery, a motor for driving a 
hydraulic pump and the like, the original 
diesel engine is cancelled, so that external passive work is converted to an 
electric energy as much as possible, and the 
electric energy is provided to the motor for driving the 
hydraulic pump; meanwhile, the configured 
power battery can store redundant 
electric energy and can provide the power to a 
system if needed by the 
system, so that work of the tensioner saves more energy; and after the 
diesel engine is cancelled, 
pollution to the surrounding environment can not be caused, andequipment running 
noise can be greatly reduced, the operation environment is optimized, and higher 
environmental protection requirements are realized.