The invention relates to an assembly type anti-buckling groove type web shear member beam-column joint connection device capable of restoring functions, and belongs to the field of structural engineering. The beam-column joint connection device comprises a square steel tube column with a cantilever beam section, an H-shaped beam section and a connection device body. Welding parts of the joint connection device are all completed in a factory, the welding seam precision and quality are easier to control, and the construction speed and the construction quality can be improved; then assembly unitson a construction site are assembled and connected with the square steel tube column with the cantilever beam section through the H-shaped beam. Joint are beam end reinforcing and flange cover plateconnecting weakening integrated joints, a multi-energy-consumption mechanism can be realized, plastic hinges can be transferred to flange cover plates, and according to the anti-buckling idea, after being buckled, the connected flange cover plates abut against groove type web shear member flanges to control the buckling amplitude value of the flange cover plates; function restoration of the structure can be achieved only by replacing connecting plates after earthquakes.