March 1 to June 30th. According to the information of "It lasts for 4 months from March, and the natural waters in Sichuan Province enter a closed fishing period" published by the query Jintai Consulting Network, the annual closed fishing period in Sichuan is from March/kloc-0 to June 30, which is the key season for fish reproduction and juvenile growth. In the meantime, strengthening the protection of natural waters will be beneficial to the reproduction of fish populations. According to the regulations, during the fishing ban, no unit or individual is allowed to fish, swim and stock waterfowl in natural waters in any form, it is forbidden to nest and take eggs, illegally dig sand and gravel, and it is forbidden to sell or buy the catches caught during the fishing ban and the fishing ban. During the "100-day Joint Enforcement Action to Protect Fishing", Sichuan will also standardize the sales, production and operation of fishing gear market and the production, supply, transportation, marketing and catering of artificially cultured aquatic products, accurately distinguish and investigate administrative violations and criminal offences, and continuously improve the level of law enforcement and the quality of handling cases.