The invention discloses a picture clipping method and device and computer equipment. The picture cutting method comprises the following steps: cutting a picture, receiving a picture cutting instruction input by a user, performing corresponding equal-ratio processing on the first cut picture according to a preset pop-up layer, receiving the size of the cutting frame; determining the actual size ofthe cutting frame in the first cutting picture; the size of the cut box is determined according to the ratio of the width to the height of the cutting frame; therefore, the scaling of the first cut picture is determined; scaling the first cut picture according to the scaling ratio, and a cutting area of the cutting frame in the target cutting picture, according to the left offset and the upper offset of the tailoring area, the tailoring area is tailored; according to the method, the position of the cropping area in the target cropping picture is determined, the images outside the cropping areaare hidden, all pixel contents of the whole picture do not need to be read into a memory, the picture cropping function is achieved under the condition that a new picture does not need to be output again, and therefore the picture cropping efficiency is improved.