The invention provides a critical data processing method. The method comprises the following steps: sending a check request to terminal equipment before preset time boundary comes, wherein the check request carries the current network time for calibrating the local time of the terminal equipment; if the check successful response is received in the preset receiving time quantum after sending the checking request and the preset response receiving time quantum is before the preset time boundary, judging whether a critical data packet sent by the terminal equipment is received; if the critical data packet sent by the terminal equipment is unreceived, sending a retransmission request to the terminal equipment until receiving the critical data packet. The technical problem that the data countedby the server is inaccurate is solved, and the technical effect of improving the accuracy rate of the critical data is achieved.