Sampling flow control device and gas analyzer

The invention discloses a sampling flow control device, which comprises a sample gas inflow channel, a carrier gas inflow channel, a flow control unit and at least two fluid control units for controlling a communicated state of a path, wherein the sample gas inflow channel and the carrier gas inflow channel are communicated with the inlet end of the flow control unit through at least one fluid control unit respectively, and the outlet end of the sample gas inlet flow and the outlet end of the flow control unit are communicated with at least one fluid control unit respectively to form the gas flow path of which a sample gas flow or a carrier gas flow can be selected to be calibrated by the flow control unit. The sampling flow control device is used for automatic calibration and checking forsampling of a sample gas, so that long-term working stability and accuracy of sampling of the sample gas are ensured; the sampling flow control device is maximally used, so that the cost is reduced;the performance of the who