The present invention related to intrathecal administration of lysosomal enzymes for effective treatment of lysosomal storage diseases. In some embodiments, the invention provides stable formulations for IT delivery of Arylsulfatase A.本發明係關於腦脊髓膜內投與溶酶體酵素以有效治療溶酶體貯積症。在一些實施例中,本發明提供用於IT遞送芳基硫酸酯酶A之穩定調配物。