Photovoltaic device for street lamp

The invention relates to the field of photovoltaics, in particular to a photovoltaic device for a street lamp. The technical problem of the invention is to provide a photovoltaic device for a street lamp. According to the technical scheme, the photovoltaic device for the street lamp comprises a bottom frame, a storage mechanism, a cleaning mechanism and a direction adjusting mechanism; the upper part of the bottom frame is connected with the storage mechanism; the upper part of the bottom frame is connected with the cleaning mechanism; and the storage mechanism is connected with the cleaning mechanism. When in use, four photovoltaic panels are automatically rotated and stacked together in sequence, so that the area of the upper surface of a photovoltaic block is reduced by a quarter, the force of strong wind on the photovoltaic panels is greatly reduced, the photovoltaic panels are prevented from being blown off by the strong wind, meanwhile, the photovoltaic panels with different heights are cleaned, dust ac