1, to confirm the facts of labor relations with the company, such as payroll, attendance records, and document records during work. 2. After confirming the labor relationship, you can negotiate with the boss to ask the unit to reissue the salary for the illegal behavior of the unit in arrears. 3. If negotiation fails, bring relevant materials to the Labor Bureau to complain, or directly submit them to the Labor Arbitration Committee where the unit is located for labor arbitration. 4. If the amount of unpaid wages is relatively large, you can directly file a lawsuit with a lawyer and get back the unpaid wages through litigation. Backpay refers to the employer's failure to pay employees' wages without any legal or even reasonable reasons. The Supplementary Provisions of the Ministry of Labor on Issues Related to the Interim Provisions on Wage Payment has made exclusionary provisions on unpaid wages. Arrears of wages for workers refer to the behavior that employers fail to pay wages for workers beyond the prescribed payment time without justifiable reasons. Not included. If the employer fails to pay the wages on time due to natural disasters, wars and other force majeure reasons, the employer may temporarily not pay the wages of the workers after the approval of the trade union of the unit because of the difficulties in production and operation and the impact of capital turnover. The longest extension period can be determined by the administrative departments of labor security of provinces, autonomous regions and municipalities directly under the Central Government according to local conditions. In other cases, wage arrears are unreasonable.