Based on the data of coal and gas outburst accidents in China from 2015 to 2024, the instantaneous/delayed types, omens, delay time, operation types and casualties of 52 outburst accidents were analyzed systematically by statistical analysis method. Among them, 36 cases were delayed type causing 198 people death. The frequency and harmfulness of delayed outbursts (69.2%) were significantly higher than that of instantaneous outbursts (30.8%) in which 79 people died; 47.2% of delayed outbursts had obvious signs (such as drilling anomaly and gas emission anomaly), and 77.4% of the delayed outbursts have delay time within 24 hours. Different operation types have significant influence on outburst occurrence, instantaneous outbursts were induced by fully mechanized tunneling accounting for 50%, while delayed outburst mostly occurred in cleaning coal and rock (33.3%) and borehole drilling (27.8%); the average death number of each outburst accident occurred in the process of support operation is the highest, reaching 9.5. The above results show that delayed outburst has become the main type of coal and gas outburst in China in recent ten years, and its harmfulness is greater, and most of them are accompanied by obvious omens; different operation types have significant effects on the occurrence mode and consequences of outburst, so differential prevention and control measures should be taken according to different operation types.