The invention provides a traditional Chinese medicine gastrointestinal developing agent for B ultrasound and a preparation method thereof. The traditional Chinese medicine comprises the following raw herbal materials: spiral shell, balanophyllia sp, phoenix tree seeds, sterculia nobilis, dahurian rose flower, birchleaf pear branchlet and leaf, fruits of lithocarpus polystachyus, auricledleaf swallowwort root, buerger raspberry root, herba agrimoniae, fimbriate calanthe pseudobulb, autumn cudweed herb, tylophora yunnanensis, forestry greenstar root, ampelopsis brevipedunculata, Tangut dragonhead herb with root and flatstiped corydalis herb. The traditional Chinese medicine gastrointestinal developing agent has the benefits that the traditional Chinese medicine gastrointestinal developing additive for B ultrasound is safe, painless and free of allergic reaction during use, is short in examination time, high in imaging rate, convenient to use and low in cost, and is an ideal novel developing agent, a strong basis is provided for the clinical diagnosis, and the preparation process is simple and practical.