Rotary waterproof button lock

The invention discloses a rotary waterproof button lock. The rotary waterproof button lock comprises a lock seat, a driving assembly, a swing arm, a sliding block, a support and a pressing head, wherein the driving assembly comprises a shaft shell and an ejector rod; the shaft shell is sleeved with a driving insertion hole; a through groove is formed in the shaft shell; a pin shaft is arranged onthe ejector rod and extends into the through groove; a spring is arranged in the portion, below the pin shaft, of the ejector rod; a locking groove matched with the end of the pin shaft is formed in the lock seat; the sliding block is installed in a sliding groove; the swing arm is connected with the shaft shell and hinged to the sliding block through a connecting rod; the support is bent; one endof the support is hinged to the lock seat, a guide groove is formed in the middle of the support, and the other end of the support is connected with the pressing head; a shifting pin is arranged on the sliding block and exten