Smoke detector sampling and positioning device

The utility model relates to a sampling and positioning device of a smoke detector. The sampling and positioning device comprises a fan and a sampling pipe, the smoke extractor is arranged on the sampling pipe; the smoke extractor comprises a shell, an electromagnetic adsorption assembly and an airflow switch assembly; an airflow channel is arranged in the shell; the electromagnetic adsorption assembly and the airflow switch assembly are arranged in the shell; when gas is collected, the electromagnetic adsorption assembly adsorbs the gas flow switch assembly, so that the gas flow channel is in an open state; when the fan performs sampling, an external control system sends a sampling instruction to a specified smoke extractor, the electromagnetic adsorption assembly is electrified, the airflow switch assembly sucks air, the airflow channel is in an open state, at the moment, air enters the shell from the airflow channel and is conveyed by the fan, the smoke extractor which does not receive the instruction is n