Balance weight for hybrid power engineering machinery and hybrid power engineering machinery

The invention discloses a balance weight for hybrid power engineering machinery. The balance weight comprises a balance weight main body (10), wherein the balance weight main body (10) comprises a casing (11) and a filler (13), the inner space of the casing (11) is separated into a filler cavity (13a) used for installing the filler (13) and an energy storage unit cavity (14a) used for installing an energy storage unit (14), and a wiring hole (12) communicated with the energy storage unit cavity (14) is arranged on the casing (11). The invention also provides the hybrid power engineering machinery comprising the balance weight. After the energy storage unit cavity is arranged in the balance weight, the energy storage unit can be directly arranged in the energy storage unit cavity, and the arrangement of the energy storage unit is convenient.