A waterproof blade type connector comprising: a first connecting member that is provided with a plurality of first terminals; and a second connecting member that includes a connecting base formed on one end of the second connecting member and having a plurality of L-shaped slots arranged thereat; a plurality of second terminals that are fixed in the L-shaped slots respectively and are connected to the first terminals respectively to form electrical connection between the first connecting member and the second connecting member; a base disposed on the other end of the second connecting member, opposite to the end of the second connecting member with the connecting base, and composed of a joining surface located on one side thereof facing the connecting base, and an assembly surface formed on the other side thereof opposite to the side with the joining surface; a frame that is disposed on the assembly surface and having a mounting space enclosed thereby and communicating with the L-shaped slots, and two locking grooves symmetrically arranged at two opposite sides thereof respectively; a pin being extended from the second terminal toward the mounting space, abutting against the frame and projecting beyond the base; a cover plate that is set in the mounting space of the frame and is composed of a locking block arranged at each of two ends thereof and locked into the locking groove for holding the pin between the frame and the cover plate, and characterised in that a first packing groove is located on the periphery of the cover plate; and the waterproof blade type connector further comprises a hot melt adhesive layer that is used to fill and seal the first packing groove and a space around the pin, wherein a second packing groove is arranged at an inner edge of the frame of the second connecting member; the pin is enclosed by the second packing groove in conjunction with the first packing groove so that a thickness of the hot melt adhesive layer filled in the space around the pin is equal to the total groove depth of the first packing groove and the second packing groove. a first connecting member that is provided with a plurality of first terminals; and a second connecting member that includes a connecting base formed on one end of the second connecting member and having a plurality of L-shaped slots arranged thereat; a plurality of second terminals that are fixed in the L-shaped slots respectively and are connected to the first terminals respectively to form electrical connection between the first connecting member and the second connecting member; a base disposed on the other end of the second connecting member, opposite to the end of the second connecting member with the connecting base, and composed of a joining surface located on one side thereof facing the connecting base, and an assembly surface formed on the other side thereof opposite to the side with the joining surface; a frame that is disposed on the assembly surface and having a mounting space enclosed thereby and communicating with the L-shaped slots, and two locking grooves symmetrically arranged at two opposite sides thereof respectively; a pin being extended from the second terminal toward the mounting space, abutting against the frame and projecting beyond the base; a cover plate that is set in the mounting space of the frame and is composed of a locking block arranged at each of two ends thereof and locked into the locking groove for holding the pin between the frame and the cover plate, and characterised in that a first packing groove is located on the periphery of the cover plate; and the waterproof blade type connector further comprises a hot melt adhesive layer that is used to fill and seal the first packing groove and a space around the pin, wherein a second packing groove is arranged at an inner edge of the frame of the second connecting member; the pin is enclosed by the second packing groove in conjunction with the first packing groove so that a thickness of the hot melt adhesive layer filled in the space around the pin is equal to the total groove depth of the first packing groove and the second packing groove.