Legal analysis: illegal. It is necessary to apply for a sand mining permit in the river, and only after obtaining a sand mining permit can we engage in sand mining activities in the river. Anyone who carries out illegal sand mining activities in the name of dredging should be severely punished by the water conservancy department. However, if the river siltation is really serious and affects flood discharge, you can apply for dredging according to the procedures, and the water conservancy department will make unified planning and formulate a scientific dredging plan according to the actual situation.

Legal basis: Article 225 of the Criminal Law of People's Republic of China (PRC), in violation of state regulations, commits one of the following illegal business operations, disrupting market order, and if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:

(a) without permission, the franchise, monopoly of goods or other goods restricted by laws and administrative regulations;

(2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;

(three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business;

(four) other illegal business activities that seriously disrupt the market order.