The present invention relates to a 3D-printing-technology-based precision drilling tool rapid moulding method used in petroleum drilling in the field of d precision tool rapid moulding, and the 3D-printing-technology-based precision drilling tool rapid moulding method is as follows: 1, acquisition of three-dimensional data of a precision tool; 2, establishment of a three-dimensional model of a to-be-produced tool according to the acquired three-dimensional data; 3, under the control of a computer system, 3 d rapid printing rapid moulding of the precision tool according to the three-dimensional model to obtain a physical tool; and 4, and necessary subsequent processing according to special performance requirements of the printed tool. The 3D-printing-technology-based precision drilling tool rapid moulding method overcomes defects of low precision, cumbersome technical process, long manufacturing cycle, low finished product yield, material loss, high cost, difficult embodiment of designing level in tool manufacturing, and the like of traditional precision drilling tool manufacturing methods, can achieve precision drilling tool accurate and rapid moulding, and improves the design and application level of the precision drilling tool.