The invention provides infant crawling trousers which sequentially comprise an upper clothes part, a connecting part and trouser leg parts from top to bottom. The upper clothes part, the connecting part and the trouser leg parts are sequentially connected to form an integral crawling trouser body; a wear-resisting part is fixedly arranged in the middle of the front surface of each trouser leg part, and the wear-resisting parts are round and made from plastic. The connecting part comprises a plurality of vertically extending connecting belts evenly distributed in the circumferential direction, and each connecting belt is provided with a plurality of adjusting holes sequentially formed from top to bottom. In the adjusting holes, male button bodies of buttons are mounted in the uppermost adjusting holes, female button bodies of the buttons are mounted in the rest of the adjusting holes, and the male button bodies are matched with the female button bodies. According to the infant crawling trousers, the lengths of the connecting belts can be adjusted by connecting the male button bodies with the female button bodies at different vertical positions, therefore, the length of the crawling trouser body is adjusted, the infant crawling trousers have a long user time for an infant growing fast, the trouser leg parts are effectively prevented from being worn on the knees of infant through the wear-resisting parts, and the wear-resisting performance is improved.