Natural-color straw pulp with improved tearing index, freeness and tensile index, and stable performance

The invention relates to natural-color straw pulp with improved tearing index, freeness and folding strength, and stable performance, in particular to natural-color straw pulp and application thereof in mixed pulp and paper products. The straw pulp has the advantages that: color phase or whiteness of the straw pulp is remarkably improved; the bulk and air permeability are high; and the acquired data of the sizing agent of the natural-color straw pulp is more stable because of small quality fluctuation of sizing agent.