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。