The invention relates to the technical field of beam column connection, and specifically relates to a connecting method of beam column connection nodes. The connecting method of beam column connectionnodes includes the following steps: fixing a simple support with a chemical bolt or a pre-embedded bolt with a diameter of 10-15 mm on a bearing platform, and at the same time maintaining the elevation of each part of the beam surface to be equal to each other, wherein the thickness of a steel plate is 12-17 mm; connecting steel bars to the simple support through spot welding; and filling in seams under a floor by means of elastic non-shrinking seam processing materials, then performing air-drying processing on the seam processing materials in the seams by using an air dryer to enable the surface temperature of the seam processing materials between 20-25 DEG, performing air cooling on the seam processing materials for 10 minutes, spraying fog water evenly on the surface of the seam processing materials, standing for half an hour, evenly smearing the seam processing materials used in the S2 on both sides of the floor seams, then performing air drying processing, and then performing aircooling for 10 minutes. The connecting method of beam column connection nodes has the advantages of simple operation, convenient usage, good connecting effect, high intensity, and a waterproof function.