The invention relates to an early warning method and a method for avoiding adjacent well bores of oil-gas well drilling from colliding, the early warning method of the invention main comprises the following steps: firstly, respectively mounting acceleration sensors on a positive well drilling and adjacent well cannulas which are possible to collide, secondly, processing vibrating signals which are induced by various acceleration sensors, and sending to a synchronous data gathering instrument, thirdly, leading the synchronous data gathering instrument to synchronously adopt vibrating data of various speed sensors in real time, and sending to a computer, fourthly, analyzing whether the analysis and judgment of a software to vibrating data has well pores colliding danger or not through vibrating data which is embedded by a computer, fifthly starting an alarming system according to the analyzing and judging results. The method can finally judge out that which adjacent well pore has a collided danger, and can alarm in time, thereby effectively lowering a danger of drilling through an adjacent well cannula. The method can be widely applied in various oil-gas well drilling processes.