The invention discloses a bagasse pulp for a film coatedbasepaper. The bagasse pulp is obtained by the following steps that: step 1, after drying the bagasse, dust and pith are removed from the bagasse, and ammonia, alkali and anthraquinone are added to the bagasse as cooking agents, distilled water is added to immerse the bagasse, and a mixed bagasse is obtained; step 2, the mixed bagasse is put in a digester, temperature is raised to 100-150 DEG C to boil the mixed bagasse, cooling, washing and concentrating are conducted to obtain a coarse bagasse pulp; step 3, hydrogen peroxide and modified zeolite are added to the bagasse pulp, a first adding of an alkali, a first heating to 50-90 DEG C, a first thermal insulation, a second adding of an alkali, a second heating to 70-100 DEG C, and a second thermal insulation are conducted, a bleached bagasse pulp is obtained; step 4, the bleached bagasse pulp is diluted, washed and purified to neutral, and is concentrated to obtain the bagasse pulp for film coatedbasepaper; the invention also discloses a film coatedbasepaper. Base slurry of the film coatedbasepaper is obtained by boiling the bagasse using ammonia method, the cost-recovering of black liquor is reduced, the modified zoelite is used as stabilizer, the efficiency of bleaching is improved, the paper pulp process design is reasonable, and the economic benefits of the film coatedbasepaper is improved.