Is it illegal to buy football online?

Breaking the law depends on your quantity. If it's serious, it's criminal law; if it's not serious, it's public security punishment law.

Legal objectivity:

Article 70 of the Law on Public Security Administration Punishment provides conditions for gambling for the purpose of making profits, or participates in gambling in a large amount, and shall be detained for not more than five days or fined not more than five hundred yuan; If the circumstances are serious, they shall be detained for more than 10 and less than 15, and fined for more than 3,000 yuan in 500 yuan. Article 303 of the Criminal Law is the crime of gambling; The crime of opening a casino is for the purpose of making profits, and those who gather people to gamble or take gambling as their business shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also be fined. Whoever opens a casino shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also be fined; If the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and shall also be fined.