The invention relates to the field of motor maintenance methods, and in particular relates to a simple and fast treatment method for preventing loosening of a stator core tooth support of a low-speedmotor to ensure complete elimination of hidden dangers of tooth support loosening. The method comprises the steps that a the part, which exceeds the length of the tooth support, of the wedge of the non-load end of a stator is removed; b a glass fiber board, polyester glass felt and epoxy resin glue are prepared; c the glass fiber board and the gum-dipped polyester polyester glass felt are insertedin the gap between the tooth support and a stator coil; D the epoxy resin glue is re-prepared, and when the glue reaches a semi-solidified state, the epoxy resin glue is continuous and uniformly coated on the top and the bevel edge of the tooth support and the exit slot of the stator coil; e the stator enters a furnace; and f the inner surface of the stator is sprayed with red enamel paint. The method provided by the invention has simple and fast operability, ensures that hidden dangers of loosening of the tooth support is completely eliminated, and is especially suitable for the treatment process of hidden dangers of loosening of the stator tooth support of a large low-speed motor below 1000r/min.