Abstract: A total of 9 tests were conducted on three kinds of full scale beam-column connections,including tooth-grooved connection,sticking steel plate welded angle iron connection and roughened interface with inserting bent-up bars connection. It was confirmed that the roughened interface connections had better performance,its strength was up to the strength of integral casting beams. It was also discussed the shear behavior and mechanism of the three kinds of connections. The formulas to calculate the shear capacity of connections were proposed,it is shown that the theoretical values were in good agreement with those of the test,and they could be used as reference in engineering practice.