The invention discloses a pressure-operated load switch for a gas-insulated ring main unit. The pressure-operated load switch comprises a support, an upper support plate, a lower support plate, support insulators, an insulating cylinder, a fixed contact, a nozzle, a movable contact, a compressor sleeve, a conductive tube, a contact seat, a main shaft, a crank arm system and a guide rod, wherein a first high-voltage shielding case and a second high-voltage shielding case are arranged outside the insulating cylinder; the internal structure of the insulating cylinder forms a load switch arc-extinguishing chamber; the load switch arc-extinguishing chamber is fixed on the support through the support insulators and the upper support plate; the guide rod is fixed on the support through the lower support plate and the support insulator; the fixed contact and the movable contact adopt arc striking contact and conductive contact all-in-one structures; and airvents are formed on the fixed contact. The pressure-operated load switch has the advantages of small size, simple contact system, strong on / off capability, high action stability and long service life.