A polyolefin micro-porous film, comprising: a polypropylene resin and a polyethylene resin, the polypropylene resin being a polymer containing propylene as a main component of a monomer in an amount of 80% or more and the polyethylene resin being a polymer containing ethylene as a main component of a monomer in an amount of 80% or more, wherein the polyolefin micro-porous film has a laminated structure in which an intermediate layer is formed of the polyethylene resin and a surface layer is formed of the polypropylene resin, wherein a meltdown temperature of the polyolefin micro-porous film is 195°C to 220°C, wherein the meltdown temperature is the temperature at which the short circuit occurs when the polyolefin micro-porous film is sandwiched with electrodes and heated, as further detailed in the description, wherein a zero shear viscosity of the polypropylene resin under a condition of 200°C is 13,000 to 20,000 Pa·s, wherein the zero shear viscosity is the value of the viscosity that became a constant value in the region of the frequency of 0.01 s -1 or less on the master curve prepared by carrying out dynamic viscoelasticity measurements, as further detailed in the description, wherein the melting point measured by differential scanning calorimetry of the polypropylene resin is 155°C or higher and 175°C or lower, wherein the polyolefin micro-porous film is uniaxially stretched by a dry method, wherein a weight-average molecular weight of the polypropylene resin is 500,000 to 800,000, wherein the weight-average molecular weight is a value in terms of polystyrene obtained by gel permeation chromatography (GPC), and wherein a molecular weight distribution of the polypropylene resin is 7.5 to 16, and wherein the molecular weight distribution is a value calculated by using the weight-average molecular weight in terms of polystyrene determined by gel permeation chromatography. a polypropylene resin and a polyethylene resin, the polypropylene resin being a polymer containing propylene as a main component of a monomer in an amount of 80% or more and the polyethylene resin being a polymer containing ethylene as a main component of a monomer in an amount of 80% or more, wherein the polyolefin micro-porous film has a laminated structure in which an intermediate layer is formed of the polyethylene resin and a surface layer is formed of the polypropylene resin, wherein a meltdown temperature of the polyolefin micro-porous film is 195°C to 220°C, wherein the meltdown temperature is the temperature at which the short circuit occurs when the polyolefin micro-porous film is sandwiched with electrodes and heated, as further detailed in the description, wherein a zero shear viscosity of the polypropylene resin under a condition of 200°C is 13,000 to 20,000 Pa·s, wherein the zero shear viscosity is the value of the viscosity that became a constant value in the region of the frequency of 0.01 s -1 or less on the master curve prepared by carrying out dynamic viscoelasticity measurements, as further detailed in the description, wherein the melting point measured by differential scanning calorimetry of the polypropylene resin is 155°C or higher and 175°C or lower, wherein the polyolefin micro-porous film is uniaxially stretched by a dry method, wherein a weight-average molecular weight of the polypropylene resin is 500,000 to 800,000, wherein the weight-average molecular weight is a value in terms of polystyrene obtained by gel permeation chromatography (GPC), and wherein a molecular weight distribution of the polypropylene resin is 7.5 to 16, and wherein the molecular weight distribution is a value calculated by using the weight-average molecular weight in terms of polystyrene determined by gel permeation chromatography. <EOS>