The invention discloses a pipe fitting joint which comprises a screw cap, a gas pipe fitting and a clamping sleeve, wherein a circular ring A, a circular ring B, a circular ring C and a circular ring D are arranged on the outer surface of the gas pipe fitting in sequence from bottom to top; the outer diameters of the circular ring A, the circular ring B, the circular ring C and the circular ring D are reduced successively; the circular ring A is fixedly connected with the circular ring B; a clamping slot is formed between the circular ring B and the circular ring C; the circular ring C is not connected with the circular ring D; the screw cap is that the diameter of an opening in the upper end of the cylindrical screw cap is less than that of the outer ring of the circular ring A, and the diameter of the opening in the upper end of the screw cap is greater than or equal to that of the outer ring of the circular ring B; threads are formed on the inner surface of the screw cap; the gas pipe fitting is inserted into the opening in the upper end of the screw cap from the lower end of the screw cap; and the clamping sleeve is fixed in the clamping slot and can be clamped above the opening in the upper end of the screw cap. The pipe fitting joint is simple in structure, convenient and practical; a user can tighten a pipeline joint with fingers; the pipe fitting joint is convenient for a pipeline system with a small die space; and meanwhile, the airtightness of the pipeline system can be improved.