A polyolefin resin satisfying following properties to: melt index (MI2.16, 190 °C, under a load of 2.16 kg) is 0.1 to 1.5 g/10 min; density is 0.91 to 0.93 g/cc; polydispersity Index (Mw(weight-average molecular weight)/Mn(number-average molecular weight)) is 3 to 7; Mz(Z-average molecular weight)/Mw(weight-average molecular weight) is 2.3 to 4.5; COI (Comonomer Orthogonal Index) value calculated by the following Equation 1 is 5 to 12; when the TREF curve of multimodal distribution is deconvoluted, the area of the TREF curve having a peak at 60 to 70 °C is 40 to 65% of the total area of the TREF curve of multimodal distribution, and an average number of SCBs per 1000 carbon atoms (1000 C) at the entire range of molecular weight of the polyolefin resin is 3 to 20, Comonomer Orthogonal Index COI = SCB number at Mz − SCB number at Mn log Mz − log Mn in Equation 1, "SCB number at Mz" represents average number of branches derived from comonomers per 1000 carbon atoms at Z-average molecular weight (Mz), and "SCB number at Mn" represents average number of branches derived from comonomers per 1000 carbon atoms at number-average molecular weight (Mn) when a molecular weight- comonomer distribution graph was prepared in which log value (log Mw) of molecular weight (Mw) is marked in x-axis of the graph and the amount of polymer (dw_dlog Mw) corresponding to the log value (log Mw) and average number of short chain branches derived from comonomer (number of branches per 1,000 carbon atoms, unit: number/1,000C) corresponding to the log value (log Mw) are marked in y-axis of the graph. melt index (MI2.16, 190 °C, under a load of 2.16 kg) is 0.1 to 1.5 g/10 min; density is 0.91 to 0.93 g/cc; polydispersity Index (Mw(weight-average molecular weight)/Mn(number-average molecular weight)) is 3 to 7; Mz(Z-average molecular weight)/Mw(weight-average molecular weight) is 2.3 to 4.5; COI (Comonomer Orthogonal Index) value calculated by the following Equation 1 is 5 to 12; when the TREF curve of multimodal distribution is deconvoluted, the area of the TREF curve having a peak at 60 to 70 °C is 40 to 65% of the total area of the TREF curve of multimodal distribution, and an average number of SCBs per 1000 carbon atoms (1000 C) at the entire range of molecular weight of the polyolefin resin is 3 to 20, Comonomer Orthogonal Index COI = SCB number at Mz − SCB number at Mn log Mz − log Mn in Equation 1, "SCB number at Mz" represents average number of branches derived from comonomers per 1000 carbon atoms at Z-average molecular weight (Mz), and "SCB number at Mn" represents average number of branches derived from comonomers per 1000 carbon atoms at number-average molecular weight (Mn) when a molecular weight- comonomer distribution graph was prepared in which log value (log Mw) of molecular weight (Mw) is marked in x-axis of the graph and the amount of polymer (dw_dlog Mw) corresponding to the log value (log Mw) and average number of short chain branches derived from comonomer (number of branches per 1,000 carbon atoms, unit: number/1,000C) corresponding to the log value (log Mw) are marked in y-axis of the graph. an average number of SCBs per 1000 carbon atoms (1000 C) at the entire range of molecular weight of the polyolefin resin is 3 to 20, Comonomer Orthogonal Index COI = SCB number at Mz − SCB number at Mn log Mz − log Mn in Equation 1, "SCB number at Mz" represents average number of branches derived from comonomers per 1000 carbon atoms at Z-average molecular weight (Mz), and "SCB number at Mn" represents average number of branches derived from comonomers per 1000 carbon atoms at number-average molecular weight (Mn) when a molecular weight- comonomer distribution graph was prepared in which log value (log Mw) of molecular weight (Mw) is marked in x-axis of the graph and the amount of polymer (dw_dlog Mw) corresponding to the log value (log Mw) and average number of short chain branches derived from comonomer (number of branches per 1,000 carbon atoms, unit: number/1,000C) corresponding to the log value (log Mw) are marked in y-axis of the graph.