Disclosed are a method and apparatus for adjusting imaging precision of a motion-sensing camera. The method comprises: acquiring an infrared speckle pattern in a target infrared scene, identifying actual definition, actual speckle regularity and an actual central region brightness of the infrared speckle pattern; and respectively comparing the actual definition with pre-set definition, comparing the actual speckle regularity with pre-set speckle regularity and comparing the actual central region brightness with pre-set brightness, and adjusting an imaging focal length according to a comparison result, so as to complete the adjustment of imaging precision. Thus, by means of the method for adjusting the imaging precision of a motion-sensing camera of the present invention, an infrared speckle pattern meeting imaging precision requirements can be obtained, after conversion from the infrared speckle pattern to a depth image, the quality of the depth image is improved, and a high-quality data source is provided for subsequent matrix identification and gesture identification.