Flexible guide device for drilling and grinding operation of casing curved well

The invention discloses a flexible guide device for drilling and grinding operation of a casing curved well, which is provided with a flexible core rod, spring top caps, an anti-bending spring, a core rod return spring and a core rod lower turncap, the spring top caps are mounted at two ends of the flexible core rod, and the core rod return spring and the core rod lower turncap are mounted in the spring top caps at the lower end of the flexible core rod; the core rod lower turncap is connected with the lower end of the flexible core rod, and the anti-bending spring is installed between the two spring top caps. The spring top cap connected to the upper end of the flexible core rod can be connected with a connector, and the spring top cap connected to the lower end of the flexible core rod can be connected with the connector and can also be connected with a guide head. The connectors at the two ends of the spring top cap can be connected with the extension short section. According to the device, the anti-bendin