The unit suddenly stopped paying social security.

Legal analysis: if the employer fails to pay social insurance premiums for the workers according to law, and the workers terminate the labor contract on this ground, the employer shall pay economic compensation to the workers. If the employer fails to apply for social insurance registration, the social insurance administrative department shall order it to make corrections within a time limit; If it fails to make corrections within the time limit, the employer shall be fined between/kloc-0 and 3 times the amount of social insurance premiums payable, and the directly responsible person in charge and other directly responsible personnel shall be fined between 500 yuan and 3,000 yuan.

Legal basis: People's Republic of China (PRC) Labor Contract Law.

Article 38 A laborer may terminate the labor contract under any of the following circumstances: (1) Failing to provide labor protection or working conditions as agreed in the labor contract; (2) Failing to pay labor remuneration in full and on time; (3) Failing to pay social insurance premiums for laborers according to law; (4) The rules and regulations of the employing unit violate the provisions of laws and regulations and damage the rights and interests of workers; (5) The labor contract is invalid due to the circumstances specified in the first paragraph of Article 26 of this Law; (6) Other circumstances under which the laborer can terminate the labor contract as stipulated by laws and administrative regulations. If the employer forces the laborer to work by means of violence, threat or illegal restriction of personal freedom, or if the employer illegally directs or forces the risky operation to endanger the personal safety of the laborer, the laborer may immediately terminate the labor contract without notifying the employer in advance.

Eighty-fourth employers do not apply for social insurance registration, the social insurance administrative department shall order them to make corrections within a time limit; If no correction is made within the time limit, the employer shall be fined between one and three times the amount of social insurance premiums payable, and the directly responsible person in charge and other directly responsible personnel shall be fined between 500 yuan and 3,000 yuan.