Surge protection device and surge protector

The utility model relates to the field of lightning protection, and provides a surge protection device, which comprises a switch control module (102), a first lightning protection element (103) and a second lightning protection element (104), and is characterized in that the switch control module (102) is connected with a first line (101) and the first lightning protection element (103); the control module is used for controlling the first lightning protection element (103) to be disconnected from the first line (101) according to the leakage current of the first lightning protection element (103) and controlling the second lightning protection element (104) to be connected to the first line (101); the first lightning protection element (103) and the second lightning protection element (104) are respectively connected with a grounding wire (106) and are used for discharging surge current in the first line (101). The surge protection device can prolong the lightning protection time of the SPD so as to improve