The utility model discloses a radial jet weight on bit controller, including top connection (1), spring (3), load cover (4), center tube (5), sliding sleeve (6), lower clutch (7), top connection (1) fixed connection is in the upper end of center tube (5), center tube (5) set up in load cover (4), the up end of load cover (4) and the spacing cooperation of lower terminal surface of top connection (1), sliding sleeve (6) slidable ground sets up intersegmental part under load cover (4), the lower extreme in sliding sleeve (6) is fixed in lower clutch (7), spring (3) cover is in center tube (5) outside, and the setting is pushed up respectively between load cover (4) and sliding sleeve (6) in the both ends of spring (3). Owing to there is the spring to carry out the control of ballast, guarantee the weight on bit apply stably, controllable, solved the unstable technical problem who increases the operation degree of difficulty of windowing of weight on bit, improved success rate and efficiency that radial jet crept into the technology.