A packet sending method includes determining, that a multipath connection meets a first condition, where the first condition is used to disable a small packet sending control policy used for the multipath connection, the small packet sending control policy is used to control a time interval at which the sender sends small packets using the multipath connection, and a length of data included in the small packet is less than a maximum segment size (MSS), disabling, by the sender, the small packet sending control policy, and sending, by the sender, a plurality of small packets on a plurality of paths of the multipath connection in a redundant transmission mode after disabling the small packet sending control policy.