Multi-cavity plastic pipe laser drilling method and machining device

The invention discloses a multi-cavity plastic pipe laser drilling method which comprises a multi-cavity plastic pipe, and a machining cavity and a plurality of other cavities are formed in the multi-cavity plastic pipe. Comprising the following steps that S1, a machining cavity and a punching face of the multi-cavity plastic pipe are confirmed, and two other cavities are randomly selected on the two sides of the machining cavity to place metal lining pipes; s2, a machining device is fixed to the machining platform, and the multi-cavity plastic pipe is placed on the machining device with the punching face facing upwards; s3, distilled water is injected into a machining cavity corresponding to the punching face of the multi-cavity plastic pipe; s4, the multi-cavity plastic pipe is fixed through a pressing device on the machining device, and distilled water is injected into the machining cavity again; compared with the prior art, an automatic feeding machining mode is adopted, the taper of the laser drilling ho