Water pipe connector for rock drilling machine

The utility model belongs to the technical field of rock drilling machinery, and provides a water pipe connector for a rock drilling machine. The water pipe connector comprises an elbow body, wherein the elbow body is provided with a water flow channel; the water flow channel comprises a water inlet and a water outlet; at least two pipe connection parts are arranged on the elbow body at a water inlet end; diameters of the pipe connection parts are different; and the diameters of the pipe connection parts at downstream in a water flow direction are greater than those of the pipe connection parts at upstream. The elbow body at the water inlet end of the water pipe connector for the rock drilling machine is provided with the pipe connection parts with different diameters; the pipe connection parts can be connected with water pipes with different inner diameters; operating staff can choose the water pipes with proper inner diameters according to working environments; and great convenience is brought for working.