The invention discloses a method for detecting an oscillation clearance of a lamp inspection machine and the lamp inspection machine. The method for detecting the oscillation clearance of the lamp inspection machine comprises the steps as follows: (S1) a conveyer drives a camera to take multiple photos of a same medicine bottle in transit in a follow-up manner under the control of a control system; (S2) the control system controls vision inspection software to measure multiple distances Li; (S3) the vision inspection software obtains L according to the measured Li, L= maxLi- minLi; (S4) L is compared with a preset value L0 in the vision inspection software; (S5) if L is smaller than L0, current detection is ended; if L is greater than or equal to L0, the conveyer is adjusted and drives thecamera to return to an initial position, and then the steps (S1) to (S4) are repeated until L is smaller than L0; (S6) the conveyer drives the camera to return to the initial position, the steps (S1)to (S5) are repeated and the next medicine bottle is detected; and (S7) the step (S6) is repeated until all medicine bottles are detected. The method disclosed by the invention is applied to the technical field of the lamp inspection machine.