Nuclear-grade pressure-resistant pressure switch

The invention relates to the technical field of pressure switches, in particular to a nuclear-grade pressure-resistant pressure switch, which is used in a cooling system in a nuclear power station and is used for monitoring the pressure of cooling water in the cooling system, and comprises a pressure-resistant shell, and a first monitoring cavity and a second monitoring cavity are distributed in the pressure-resistant shell up and down, and the detection ports of the first monitoring cavity and the second monitoring cavity are communicated with the cooling system. Through two monitoring methods in the first monitoring mechanism and a continuous pressure monitoring method in the second monitoring mechanism, the water pressure condition can be monitored in multiple aspects, data of the three monitoring methods can be mutually verified, and data misalignment caused by damage of a single monitoring method is prevented; problems can be found out by comparing data, meanwhile, when the water pressure change exceeds