The invention discloses a photovoltaic module circuit unit, a photovoltaic module circuit and a photovoltaic module. The photovoltaic module circuit unit comprises at least two first solar cell unitswhich are connected in parallel with diodes, wherein the first solar cell unit comprises at least two second solar cell units which are connected in series; the second solar cell unit comprises at least two solar cell string units which are connected in parallel; the solar cell string unit comprises a plurality of solar cells which are connected in series, and the sum of the currents of all the first solar cell units is larger than the current of the whole battery piece; the photovoltaic module circuit comprises at least two photovoltaic module circuit units which are connected in series; thephotovoltaic module comprises a plurality of solar cell packs; and the plurality of solar cell packs are electrically connected through the photovoltaic module circuit, so that the current of the module exceeds the current of the whole battery piece, and the power of the module is improved.