The method of manufacturing a polyene-based polarizing film of the present invention comprises: a first step of preparing a coating solution including a neutralizing compound of an acid catalyst and polyvinyl alcohol; A second step of forming a coating layer on the base film by applying the coating solution on the base film; A third step of dry stretching the base film and the coating layer; And a fourth step of causing a dehydration reaction to the polyvinyl alcohol in the coating layer, wherein the coating solution for preparing a polyene-based polarizing film contains a neutralizing compound of an acid catalyst and polyvinyl alcohol, and the polyene-based polarizing film has a transmittance (wet (wet) transmittance) x and polarization degree y satisfy Equation 1.